Tootfinder

Nextdoor unveils new features like an interactive neighborhood map called Alerts, partners with 3,500 local news outlets, and more, to revitalize its app (Mia Sato/The Verge)
https://www.theverge.com/news/706618/nextdoor-redesign-ai-reco…

Can Nextdoor overhaul itself to be useful?
Neighborhood app Nextdoor is adding local news content, an AI-powered recommendations chatbot, and a map of emergency events.

In Little Tokyo, a five-block neighborhood east of downtown Los Angeles that is among the country’s largest Japanese American enclaves,
news often gets delivered and shared at the century-old koban.
It’s a community security office similar to those in Japan,
housed in a former police substation and named after a local hero from World War II.

Brian Kito stood on the sidewalk outside the koban Wednesday,
surveying the street that’s become a hot spot of activity a…

Solidarity and dismay in a neighborhood on the edge of the L.A. protests
Historic Little Tokyo, one of the largest enclaves of Japanese Americans in the country, is supporting protests over the immigration raids — with a caveat.

In the wake of the official MN Capitol rally being cancelled, lots of neighborhood protests springing up in its place. Judging by local reaction, that MAGA serial killer is going to cause •more• protest, not less. This makes me feel better about the decision to cancel the big one (which, per the previous post, I am truly torn about).

Associated primes of the second power of closed neighborhood ideals of graphs
Ha Thi Thu Hien, Thanh Vu
https://arxiv.org/abs/2507.08777 https://

Associated primes of the second power of closed neighborhood ideals of graphs
We study simple graphs for which the maximal homogeneous ideal is an associated prime of the second power of their closed neighborhood ideals. In particular, we show that such graphs must have diameter at most $6$, and that those with diameter $2$ must be vertex diameter-$2$-critical.

The last coffee in my favorite neighborhood spot in #Hanoi. 👋❤️
I will miss the Vietnamese vibe

Boom! ⚡️

Mark Davis Will Welcome Raiders' New Neighbors with Open Arms https://www.si.com/nfl/raiders/mark-davis-las-vegas-oakland-athletics-mlb

Odd coloring graphs with linear neighborhood complexity
James Davies, Meike Hatzel, Kolja Knauer, Rose McCarty, Torsten Ueckerdt
https://arxiv.org/abs/2506.08926

Odd coloring graphs with linear neighborhood complexity
We prove that any class of bipartite graphs with linear neighborhood complexity has bounded odd chromatic number. As a result, if $\mathcal{G}$ is the class of all circle graphs, or if $\mathcal{G}$ is any class with bounded twin-width, bounded merge-width, or a forbidden vertex-minor, then $\mathcal{G}$ is $χ_{odd}$-bounded.

There's an ice cream truck trawling my neighborhood, and the music it's broadcasting is... Christmas carols.

Waymo Pauses Service in Downtown LA Neighborhood Where They're Getting Lit on Fire https://www.404media.co/waymo-pauses-service-in-downtown-la-neighborhood-where-theyre-getting-lit-on-fire/

«So even though driverless cars nominally have nothing to do with law enforcement, police are treating them as though they are their own roving surveillance cameras.».
And by extension, protestors and other people start to view them as the state surveillance tools they are.
https://www.404media.co/waymo-pauses-service-in-downtown-la-neighborhood-where-theyre-getting-lit-on-fire/

It's finally warm enough outside to not need a jacket for these trips around the neighborhood.

decoupled this one right out of 11ty’s new demo/playground component: https://neighborhood.11ty.dev/@11ty/114519676689929120

“He's waiting for me” 🦆👀
https://theblast.com/687811/rogue-florida-duck-reigns-terror-on-the-elderly-in-quiet-neighborhood/

Florida Duck On A Rampage, Injures Seniors & Evades Law
A furious Florida duck is ambushing seniors on porches, sending one to the ER. Locals are shaken, and no one’s stepping in to help.

🇺🇦 #NowPlaying on #BBC6Music's #DonLettsCultureClashRadio
Youth Lagoon:
🎵 Neighborhood Scene
#YouthLagoon
https://youthlagoon.bandcamp.com/track/neighborhood-scene
https://open.spotify.com/track/2kgTCdftXDfT8idrJdvGUp

CVS was so worried about shoplifting that it stole its own soul
I’m no marketing whiz, but it seems to me that CVS,
like a lot of brick-and-mortar businesses these days,
is confused about which business it’s actually in.
CVS might think it’s still in the business of helping you restock your toothpaste and bodywash, like a giant vending machine,
but plenty of online sites are doing that more cheaply and just as reliably.
What your neighborhood chain can …

CVS was so worried about shoplifting that it stole its own soul
My local pharmacy’s products are now encased in glass, and the whole thing makes me very nervous.

After 15 full days in the new house, I think it's time to close off this year-long thread. Some closure on past commentary:
- for the 1st in our lives, we are debt free. Took us nearly 70 years, but we know how incredibly fortunate we are.
- we've dumped our net proceeds from #Downsizing into investments to make sure we aren't tempted to spend it foolishly.
- we kept some funds to fix some issues, including furnace & A/C, water filtration, electrical, eavestroughs, etc.
- my daughter and I are once again fighting galactic aliens online so you can rest easy.
- we've only been to the beach twice, for very short visits, as things have been hectic. Hopefully, we can enjoy that part of our neighborhood as we get into August.
Here is a short video of our 1st walk through just a few minutes before the movers arrived.
#Moving

This morning I had to get some work done so I did a short ride of just 3 miles around the neighborhood on the old 1970's Raleigh. I tried to notice what causes the squeaks and rubbing noises and did a little maintenance when I got home.
No huge hills on this ride, it's a 3-speed, but I did have an average 11mph for the 16 minute ride.
#biking

Expansion of a bivariate symmetric mean in the neighborhood of the first bisector
Bakir Farhi
https://arxiv.org/abs/2506.07601 https://

Expansion of a bivariate symmetric mean in the neighborhood of the first bisector
In this paper, we investigate the behavior of a bivariate mean $M$ near the first bisector by establishing, in several significant cases, an important expansion of $M$ derived from the Taylor expansion of a single-variable function. These expansions are made explicit for a number of classical means. This motivates the introduction of the concept of the characteristic function $Q_M$ of a mean $M$, defined as the second partial derivative of $M$ with respect to its first variable, evaluated along…

i saw this in a krugman post:
Recently the West Side Rag, my ultra-local news source, ran an article titled “The Upper West Side: A Neighborhood for Independent Minds.” Lots of interesting history, but frankly my first reaction was “Yeah, independent minds who can afford to pay $1600 a square foot for housing.”
meanwhile my next door neigbor just got halfway-to-new-york-ridiculous per sq ft. in ann arbor for pete's sake

At 7 I was walking the 5-ish blocks to/from the neighborhood grocery store occasionally & exploring the patch of woods halfway there. By 9 I was biking over a mile to school every day and often further to my Dad’s apartment. All in University City, an inner suburb of St. Louis. Some of it crossing or riding on major arterial roads & crossing a freeway.
I wasn’t special in any of that. My sisters & kids in my neighborhood did it too.

Dynamical Horizon Segments and Spacetime Isometries
Abhay Ashtekar, Badri Krishnan
https://arxiv.org/abs/2506.10190 https://arxiv.org…

Dynamical Horizon Segments and Spacetime Isometries
Given a space-time $(\mathscr{M}, g_{ab})$ admitting a dynamical horizon segment (DHS) $\mathscr{H}$, we show that there are stringent constraints on the Killing fields $ξ^a$ that $g_{ab}$ can admit in a neighborhood of $\mathscr{H}$: Generically, $ξ^a$ can only be a rotational Killing field which, furthermore, leaves each marginally trapped 2-sphere cross-section $\mathcal{S}$ of $\mathscr{H}$ invariant. Finally, if $ξ^a$ happens to be hypersurface orthogonal near $\mathscr{H}$, then, not o…

I enjoy bicycling through a neighborhood nicer than my own. MAGA vibe, though.

Neighborhood Overlap-Aware High-Order Graph Neural Network for Dynamic Graph Learning
Ling Wang
https://arxiv.org/abs/2506.06728 https://

Neighborhood Overlap-Aware High-Order Graph Neural Network for Dynamic Graph Learning
Dynamic graph learning (DGL) aims to learn informative and temporally-evolving node embeddings to support downstream tasks such as link prediction. A fundamental challenge in DGL lies in effectively modeling both the temporal dynamics and structural dependencies of evolving graph topologies. Recent advances in Dynamic Graph Neural Networks (DGNNs) have obtained remarkable success by leveraging message-passing mechanisms to capture pairwise node interactions. However, these approaches often over…

Stellar Ancestry Unlocked: Chemical and Orbital Clues Link Metal Poor Stars to Globular Clusters and the Galaxy's Thick Disk
Gizay Yolalan, Timur \c{S}ahin, Sel\c{c}uk Bilir, Olcay Plevne
https://arxiv.org/abs/2506.10400

Stellar Ancestry Unlocked: Chemical and Orbital Clues Link Metal Poor Stars to Globular Clusters and the Galaxy's Thick Disk
This study presents a detailed chemical, kinematic, and orbital dynamic analysis of five metal poor stars in the solar neighborhood: HD 2665, HD 5916, HD 122956, HD 189349, and HD 218857. Using high-resolution spectroscopic data from the ELODIE and ESPaDOnS instruments, we derived elemental abundances for 29 species (25 elements: C, O, Na, Mg, Al, Si, S, Ca, Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Sr, Y, Zr, Ba, Ce, Nd, and Sm) via LTE based analysis with ATLAS9 model atmospheres. Notably, we re…

Solving the Pod Repositioning Problem with Deep Reinforced Adaptive Large Neighborhood Search
Lin Xie, Hanyi Li
https://arxiv.org/abs/2506.02746 https://…

Solving the Pod Repositioning Problem with Deep Reinforced Adaptive Large Neighborhood Search
The Pod Repositioning Problem (PRP) in Robotic Mobile Fulfillment Systems (RMFS) involves selecting optimal storage locations for pods returning from pick stations. This work presents an improved solution method that integrates Adaptive Large Neighborhood Search (ALNS) with Deep Reinforcement Learning (DRL). A DRL agent dynamically selects destroy and repair operators and adjusts key parameters such as destruction degree and acceptance thresholds during the search. Specialized heuristics for bo…

Semantic Certainty Assessment in Vector Retrieval Systems: A Novel Framework for Embedding Quality Evaluation
Y. Du
https://arxiv.org/abs/2507.05933 https:…

Semantic Certainty Assessment in Vector Retrieval Systems: A Novel Framework for Embedding Quality Evaluation
Vector retrieval systems exhibit significant performance variance across queries due to heterogeneous embedding quality. We propose a lightweight framework for predicting retrieval performance at the query level by combining quantization robustness and neighborhood density metrics. Our approach is motivated by the observation that high-quality embeddings occupy geometrically stable regions in the embedding space and exhibit consistent neighborhood structures. We evaluate our method on 4 standar…

Graph Estimation Based on Neighborhood Selection for Matrix-variate Data
Minsub Shin, Johan Lim, Seongoh Park
https://arxiv.org/abs/2507.04711 https://

Graph Estimation Based on Neighborhood Selection for Matrix-variate Data
Undirected graphical models are powerful tools for uncovering complex relationships among high-dimensional variables. This paper aims to fully recover the structure of an undirected graphical model when the data naturally take matrix form, such as temporal multivariate data. As conventional vector-variate analyses have clear limitations in handling such matrix-structured data, several approaches have been proposed, mostly relying on the likelihood of the Gaussian distribution with a separable…

Large Neighborhood and Hybrid Genetic Search for Inventory Routing Problems
Jingyi Zhao, Claudia Archetti, Tuan Anh Pham, Thibaut Vidal
https://arxiv.org/abs/2506.03172

Large Neighborhood and Hybrid Genetic Search for Inventory Routing Problems
The inventory routing problem (IRP) focuses on jointly optimizing inventory and distribution operations from a supplier to retailers over multiple days. Compared to other problems from the vehicle routing family, the interrelations between inventory and routing decisions render IRP optimization more challenging and call for advanced solution techniques. A few studies have focused on developing large neighborhood search approaches for this class of problems, but this remains a research area with…

A comet the size of a small city... just passing by our neighborhood onto the next solar system in a few million years.
#astronomy #comet #interstellar
https://www.cbc.ca/news/science/a11pl3z-discovery-interstellar-object-1.7575576

I had to buy a 7up because the neighborhood gas station was out of Squirt. 😒

This fits the definition of terrorism.
https://www.theguardian.com/us-news/2025/jul/07/los-angeles-park-federal-officers-national-guard?CMP=Share_iOSApp_Other

A Model-Free Extremum Seeking Controller with Application to Tracking a Nonlinear Chemical Reaction
Alexander Zuyev, Victoria Grushkovska
https://arxiv.org/abs/2507.07749

A Model-Free Extremum Seeking Controller with Application to Tracking a Nonlinear Chemical Reaction
In this paper, we develop the extremum-seeking approach to generate admissible trajectories in a neighborhood of a given reference curve in the state space. The cost function of the problem represents the distance between the current system state and the reference curve, which is parameterized as a function of time. Such reference curves naturally arise as optimal trajectories in isoperimetric optimization problems for nonlinear chemical reactions, where the objective is to maximize the average…

I was really angry last night about the fireworks being set off in our neighborhood. Our dog is severely traumatized by them. She hides under a chair and pants until about an hour after they stop going off.
However, my posts were much more generalized and that was not called for.
*** If I offended you with my posts, I apologize. ***
I do not apologize for wanting to end the use of fireworks.

Theoretical Learning Performance of Graph Neural Networks: The Impact of Jumping Connections and Layer-wise Sparsification
Jiawei Sun, Hongkang Li, Meng Wang
https://arxiv.org/abs/2507.05533

Theoretical Learning Performance of Graph Neural Networks: The Impact of Jumping Connections and Layer-wise Sparsification
Jumping connections enable Graph Convolutional Networks (GCNs) to overcome over-smoothing, while graph sparsification reduces computational demands by selecting a sub-matrix of the graph adjacency matrix during neighborhood aggregation. Learning GCNs with graph sparsification has shown empirical success across various applications, but a theoretical understanding of the generalization guarantees remains limited, with existing analyses ignoring either graph sparsification or jumping connections.…

Efficient and Adaptive Estimation of Local Triadic Coefficients
Ilie Sarpe, Aristides Gionis
https://arxiv.org/abs/2507.07536 https://

Efficient and Adaptive Estimation of Local Triadic Coefficients
Characterizing graph properties is fundamental to the analysis and to our understanding of real-world networked systems. The local clustering coefficient, and the more recently introduced, local closure coefficient, capture powerful properties that are essential in a large number of applications, ranging from graph embeddings to graph partitioning. Such coefficients capture the local density of the neighborhood of each node, considering incident triadic structures and paths of length two. For t…

There are any number of ways to keep Altadena affordable.
Ban single-family detached dwellings.
Ban off-street parking.
Build 6-story affordable housing on scattered sites.
The aim here is to maintain the area's high social status via exclusion. Based on uncool-ness rather than income or race.
[reply to: https://

Spectral convergence of graph Laplacians with Ricci curvature bounds and in non-collapsed Ricci limit spaces
Masato Inagaki
https://arxiv.org/abs/2506.07427

Spectral convergence of graph Laplacians with Ricci curvature bounds and in non-collapsed Ricci limit spaces
This paper establishes quantitative high-probability bounds on the eigenvalues and eigenfunctions of $ε$-neighborhood graph Laplacians constructed from i.i.d. random variables on $m$-dimensional closed Riemannian manifolds $(M,g)$ that satisfy a uniform lower Ricci curvature bound $\operatorname{Ric}_g\ge -(m-1)K$, a positive lower volume bound, and an upper diameter bound. These results extend to non-collapsed Ricci limit spaces that are measured Gromov-Hausdorff limits of such manifolds, and…

A sad neighborhood story in 2 pictures. #ohio

On the Complexity of Claw-Free Vertex Splitting
Faisal N. Abu-Khzam, Sergio Thoumi
https://arxiv.org/abs/2506.06044 https://arxiv.org…

On the Complexity of Claw-Free Vertex Splitting
Vertex splitting consists of taking a vertex v in a graph and replacing it with two vertices whose combined neighborhoods is the neighborhood of v. The split is said to be exclusive when these neighborhoods are disjoint. In the (Exclusive) Claw-Free Vertex Splitting problem, we are given a graph G and an integer k, and we are asked if we can find a subset of at most k vertices whose (exclusive) splitting can make G claw-free. We consider the complexity of Exclusive Claw-Free Vertex Splitting an…

#birdsOfMastodon #birds #naturePhotography
A cormorant standing on rocks at the edge of a pond. June 2025

Well, the good news is that it’s over. Run/walk staying in HR zone 2 and I think I was walking more than running. My fitness is 💩 right now. The humidity about killed me, even at 0730. I should have gone out earlier.
I’m at my in-laws place in Tennessee for the holiday weekend, of which this beautiful neighborhood has so few mature trees. As such, the sun gleefully poured out its angry menace upon me the entire time and I suffered. I am meant for cold weather.

There were significant fewer American flags flying in my suburban NJ neighborhood this Fourth of July.
#uspol #july4th #trump

The day after families across the country gathered to celebrate Father’s Day,
Francisco Romero huddled at dawn with 10 volunteers in a South Los Angeles parking lot.
🙏🏻The group was preparing to patrol the neighborhood for signs of Immigration and Customs Enforcement activity.
There was a heaviness in the atmosphere, despite the comradery and smiles.
During the group huddle, some reflected on the difficulty celebrating Father’s Day while families across the city were…

Trained Volunteers Patrol L.A. Streets as ICE Raids Intensify
Neighborhood groups monitor immigration enforcement amid rising fear and federal scrutiny.

Trump proposes elimination of
National Endowment for the Arts,
National Endowment for the Humanities;
Inter-American Foundation;
Institute for Museum and Library Sciences in 2026 budget. #NEH #NEA

Training-Free Query Optimization via LLM-Based Plan Similarity
Nikita Vasilenko, Alexander Demin, Vladimir Boorlakov
https://arxiv.org/abs/2506.05853 https…

Training-Free Query Optimization via LLM-Based Plan Similarity
Large language model (LLM) embeddings offer a promising new avenue for database query optimization. In this paper, we explore how pre-trained execution plan embeddings can guide SQL query execution without the need for additional model training. We introduce LLM-PM (LLM-based Plan Mapping), a framework that embeds the default execution plan of a query, finds its k nearest neighbors among previously executed plans, and recommends database hintsets based on neighborhood voting. A lightweight cons…

Wow, what Neighborhood Commercial District wouldn't value 50% increase in expenditures, let alone a doubling? (Based on MasterCard data of card use)
Over the years I visited a good friend in this area. This change is magical.
Maybe other cities could have similar results?
https://www.youtube.com/wa…

Wow, what Neighborhood Commercial District wouldn't value 50% increase in expenditures, let alone a doubling? (Based on MasterCard data of card use)
Over the years I visited a good friend in this area. This change is magical.
Maybe other cities could have similar results?
https://www.youtube.com/wa…

A Differential Evolution Algorithm with Neighbor-hood Mutation for DOA Estimation
Bo Zhou, Kaijie Xu, Yinghui Quan, Mengdao Xing
https://arxiv.org/abs/2507.06020

A Differential Evolution Algorithm with Neighbor-hood Mutation for DOA Estimation
Two-dimensional (2D) Multiple Signal Classification algorithm is a powerful technique for high-resolution direction-of-arrival (DOA) estimation in array signal processing. However, the exhaustive search over the 2D an-gular domain leads to high computa-tional cost, limiting its applicability in real-time scenarios. In this work, we reformulate the peak-finding process as a multimodal optimization prob-lem, and propose a Differential Evolu-tion algorithm with Neighborhood Mutation (DE-NM) to eff…

#UpliftMoment
This morning I learned the Soup Kitchen in my #nyc neighborhood was $50k in the hole bc of fed grant cancellations
By midday I learned the entire neighborhood was throwing a fundraising party to feed mouthes uptown
This evening 100s of neighbors danced to Caribbean music & raised ❤️❤️&💰💰
#NeighborsHelpingNeighbors

StreetLens: Enabling Human-Centered AI Agents for Neighborhood Assessment from Street View Imagery
Jina Kim, Leeje Jang, Yao-Yi Chiang, Guanyu Wang, Michelle Pasco
https://arxiv.org/abs/2506.14670

StreetLens: Enabling Human-Centered AI Agents for Neighborhood Assessment from Street View Imagery
Traditionally, neighborhood studies have employed interviews, surveys, and manual image annotation guided by detailed protocols to identify environmental characteristics, including physical disorder, decay, street safety, and sociocultural symbols, and to examine their impact on developmental and health outcomes. While these methods yield rich insights, they are time-consuming and require intensive expert intervention. Recent technological advances, including vision-language models (VLMs), have…

An Analytical Neighborhood Enrichment Score for Spatial Omics
Axel Andersson, Hanna Nystr\"om
https://arxiv.org/abs/2506.18692 https://

An Analytical Neighborhood Enrichment Score for Spatial Omics
The neighborhood enrichment test is used to quantify spatial enrichment and depletion between spatial points with categorical labels, which is a common data type in spatial omics. Traditionally, this test relies on a permutation-based Monte Carlo approach, which tends to be computationally expensive for large datasets. In this study, we present a modified version of the test that can be computed analytically. This analytical version showed a minimum Pearson correlation of 0.95 with the conventi…

OK, so here is purportedly ICE doing a raid ... and the news media quietly accepts, from "agents" who displayed no proof that they were actually Federal agents, much less their identity.
How can we know that these masked men (most of 'em are men) are actually who they claim to be?

ICE arrests several workers from South Park restaurant
U.S. Immigration and Customs Enforcement agents made arrests Friday afternoon at Buona Forchetta, an Italian restaurant in the South Park neighborhood of San Diego.

Cosmic-ray and Interstellar Gas Properties in the Solar Neighborhood Revealed by Diffuse Gamma Rays
Tsunefumi Mizuno, Katsuhiro Hayashi, Hinako Ochi, Igor V. Moskalenko, Elena Orlando, Andrew W. Strong
https://arxiv.org/abs/2506.16252

Cosmic-ray and Interstellar Gas Properties in the Solar Neighborhood Revealed by Diffuse Gamma Rays
To investigate the interstellar medium (ISM) and Galactic cosmic rays (CRs) in the solar neighborhood, we analyzed $γ$-ray data by Fermi Large Area Telescope (LAT) for five nearby molecular cloud regions. Our data includes the MBM/Pegasus region (MBM~53, 54, 55 clouds and Pegasus loop), R CrA region (R Coronae Australis clouds), Chamaeleon region (Chamaeleon clouds), Cep/Pol region (Cepheus and Polaris flare), and Orion region (Orion clouds). The ISM templates are constructed by a component de…

I rarely leave my neighborhood these days, so when the opportunity came last weekend to visit a town about 80 km from my home, I took a little detour to visit and take photos of the town’s only national historical marker.
(Those who have been following me long enough know that documenting historical markers in #Wikidata and

Landing at Nasugbu historical marker
NHI historical marker for the landing of the American forces at Nasugbu during World War II

IDK, I’m just your friendly neighborhood #bisexual who’s really into #anarchism, especially the rocker-flavored, anarcho-syndicalist kind.
Sprinkle in a dash of #ActuallyAutistic

Node-neighbor subnetworks and Hk-core decomposition
Dinghua Shi, Yang Zhao, Guanrong Chen
https://arxiv.org/abs/2507.04948 https://ar…

Node-neighbor subnetworks and Hk-core decomposition
The network homology Hk-core decomposition proposed in this article is similar to the k-core decomposition based on node degrees of the network. The C. elegans neural network and the cat cortical network are used as examples to reveal the symmetry of the deep structures of such networks. First, based on the concept of neighborhood in mathematics, some new concepts are introduced, including such as node-neighbor subnetwork and Betti numbers of the neighbor subnetwork, among others. Then, the Bet…

Elementary Cellular Automata as Non-Cryptographic Hash Functions
Daniel McKinley
https://arxiv.org/abs/2506.06551 https://arxiv.org/p…

Elementary Cellular Automata as Non-Cryptographic Hash Functions
A subset of 10 of the 256 elementary cellular automata (ECA) are implemented as a hash function using an error minimization lossy compression algorithm operating on wrapped 4x4 neighborhood cells. All 256 rules are processed and 10 rules in two subsets of 8 are found to have properties that include both error minimization and maximization, unique solutions, a lossy inverse, efficient retroactive hashing, and an application to edge detection. The algorithm parallels the nested powers-of-two stru…

Replaced article(s) found for math.CV. https://arxiv.org/list/math.CV/new
[1/1]:
- On the neighborhood of a torus leaf and dynamics of holomorphic foliations
Takayuki Koike, Noboru Ogawa

🇺🇦 Auf radioeins läuft...
Arcade Fire:
🎵 Neighborhood No. 3
#NowPlaying #ArcadeFire
https://open.spotify.com/track/0WZZJ0mDKIkLfL0710ssZt

My dog and I like to walk around the neighborhood together. We like to sniff things out.

Walking around the neighborhood, & someone has strewn leeks by the sidewalk every 50 yards or so.
Loose leeks sink sheeps?

💯💯💯
"If a billionaire bought one of your local haunts, renamed it, humiliated the employees, brought back many of the people who’d been banned for harassing other regulars, eliminated basic rules of decency, started having town halls with Republicans and a leader of the #AfD, taking your business elsewhere would be perfectly rational."
#

Existence of radially symmetric stationary solutions for viscous and Heat-conductive ideal Gas
Itsukoo Hashimoto, Akitaka Matsumura
https://arxiv.org/abs/2507.04234

Existence of radially symmetric stationary solutions for viscous and Heat-conductive ideal Gas
We consider the existence of radially symmetric stationary solutions of the compressible viscous and heat-conductive polytropic ideal fluid on the unbounded exterior domain of a sphere where the boundary and far-field conditions are prescribed. The unique existence of the stationary solution is shown for both inflow and outflow problems in a suitably small neighborhood of the far-field state. Estimates of the algebraic decay rate toward the far field state are also obtained.

Remember - if your kids go to school, a school that provides free busing to everyone who lives more than a KM away, that's in a quiet neighborhood perfect for walking and cycling, and that's in one of the largest cities on the continent (a city that has a generally functional transit system), you have NO CHOICE but to drive them to school every day.

From spatial to null infinity: Connecting initial data to peeling
Berend Schneider, Neev Khera
https://arxiv.org/abs/2507.07977 https://

From spatial to null infinity: Connecting initial data to peeling
The asymptotic structure of space-time is studied by imposing conditions on the asymptotics of the metric. These conditions are weak enough to include large classes of physically relevant isolated space-times, but have a rich enough structure to be able to define important physically meaningful quantities like mass, angular momentum, and gravitational waves. By using a unified expansion of the metric in a neighborhood of spatial infinity that includes a piece of null infinity, we connect the …

Towards a p-adic nowhere density conjecture of Hecke Orbits
Yu Fu
https://arxiv.org/abs/2506.06932 https://arxiv.org/pdf/2506.06932…

Towards a p-adic nowhere density conjecture of Hecke Orbits
We propose a conjecture on the $p$-adic nowhere density of the Hecke orbit of subvarieties of Hodge type Shimura varieties. By investigating the monodromy of $p$-adic Galois representations associated with points on such Shimura varieties, we prove that the locus in a formal $\mathcal{O}_K$-neighborhood of a mod $p$ point that has large monodromy is open dense, where $K$ is a totally ramified finite extension of $\breve{\mathbb{Q}}_p.$

Nested economies of scale in city mass
Kangning Huang, Mingzhen Lu
https://arxiv.org/abs/2507.03960 https://arxiv.org/pdf/2507.03960

Nested economies of scale in city mass
A longstanding puzzle in urban science is whether there's an intrinsic match between human populations and the mass of their built environments. Previous findings have revealed various urban properties scaling nonlinearly with population, yet existing models of city built mass are still dominated by per-capita linear thinking. Our analysis of >3,000 cities globally reveals universal sublinear scaling of city mass with population at both the city (\{beta}=0.90) and neighborhood levels (δ=0.75).…

This https://arxiv.org/abs/2506.03439 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_ees…

Optimizing Software Defined Battery Systems for Transformer Protection
Residential electric vehicle charging causes large spikes in electricity demand that risk violating neighborhood transformer power limits. Battery energy storage systems reduce these transformer limit violations, but operating them individually is not cost-optimal. Instead of individual optimization, aggregating, or sharing, these batteries leads to cost-optimal performance, but homeowners must relinquish battery control. This paper leverages virtualization to propose battery sharing optimizati…

"Geothermal energy keeps utility bills low in this Texas neighborhood"
#US #USA #America #Energy

Geothermal energy keeps utility bills low in this Texas neighborhood
The development outside Austin taps into natural heat deep underground to run heating and cooling systems for the planned 7,500 homes and other buildings.

Coffee and pastry lovers in the Twin Cities . . . the staff at Groundswell could use a little help if you have a little to spare. https://gofund.me/48ade0a3

Donate to Support Groundswell and staff after fire, organized by janette maruska
Sadly, our neighborhood Cafe, Groundswell caught fire around 10pm on 5/22 lea… janette maruska needs your support for Support Groundswell and staff after fire

Now I’m on MIRAC’s mailing list, so hopefully I don’t miss the next one.
Also, though…it is just deeply heartening to randomly encounter a protest: not a thing that I already knew about, but a thing that just •showed up• in my neighborhood. It makes me feel like the circle of resistance is much bigger than my own little circle. And it is.
That’s the feeling I want us to create: “Wow, these protests are everywhere.”

In other news, today my neighborhood got glass fiber installed across all houses, now we have to wait for Swisscom to send the appropriate modem for it to become useful.
Apparently it's 10x faster than our current internet connection, we'll see.

On our way to Costco yesterday, and saw that the one of the local “no/ez credit car lots in our neighborhood* has a Cybertruck 😂
This is the car dealer where they asked us “why are you here?“ When they discovered we didn’t have bad credit. (respect for honesty I guess🤷🏻‍♀️)
So that’s kinda hilarious

This https://arxiv.org/abs/2412.13727 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

Open Superclusters II. Discovery of an Inactive Supercluster Including a New Star Cluster in the Solar Neighborhood
The number of known star clusters, associations, and moving groups in the vicinity of the Sun has increased significantly due to the use of Gaia data. We investigated the existence and properties of open superclusters (OSC) within 500 pc of the Sun, with a particular focus on a newly identified OSC, designated HC8. Using advanced Gaia-derived astrometric data and star cluster catalogs, we identify and analyze member stars of various clusters, deriving key parameters such as ages, distances, ext…

Flux of Extragalactic Dark Matter in Direct Detection Experiments
Shokhruz Kakharov, Abraham Loeb
https://arxiv.org/abs/2507.01190 https://

Flux of Extragalactic Dark Matter in Direct Detection Experiments
We calculate the contribution of extragalactic dark matter to the local dark matter density and flux in the Milky Way. By analyzing the Galactic escape velocity as a function of direction, we establish the criterion for separating dark matter particles bound to the Milky Way and those originating from the Local Group environment. Our analysis reveals that approximately 25% of dark matter particles in the Solar neighborhood have an extragalactic origin, contributing nearly 38% of the total mass …

A theoretical prediction for the dipole in nearby distances using cosmography
Hayley J. Macpherson, Asta Heinesen
https://arxiv.org/abs/2507.01095 https://…

A theoretical prediction for the dipole in nearby distances using cosmography
Cosmography is a widely applied method to infer kinematics of the Universe at small cosmological scales while remaining agnostic about the theory of gravity at play. Usually cosmologists invoke the Friedmann-Lemaitre-Robertson-Walker (FLRW) metric in cosmographic analyses, however generalised approaches allow for analyses outside of any assumed geometrical model. These methods have great promise to be able to model-independently map the cosmic neighborhood where the Universe has not yet converg…

A trust-region framework for optimization using Hermite kernel surrogate models
Sven Ullmann, Tobias Ehring, Robin Herkert, Bernard Haasdonk
https://arxiv.org/abs/2507.01729

A trust-region framework for optimization using Hermite kernel surrogate models
In this work, we present a trust-region optimization framework that employs Hermite kernel surrogate models. The method targets optimization problems with computationally demanding objective functions, for which direct optimization is often impractical due to expensive function evaluations. To address these challenges, we leverage a trust-region strategy, where the objective function is approximated by an efficient surrogate model within a local neighborhood of the current iterate. In particula…

This https://arxiv.org/abs/2412.05927 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

Abstract categorical residues and Calabi-Yau structures
Inspired by the simple fact that a compact n-dimensional manifold-with-boundary which satisfies Poincaré-Lefschetz duality of dimension n has a boundary which itself satisfies Poincaré duality of dimension n, we show that the categorical formal punctured neighborhood of infinity, a canonical categorical construction associated to every $A_{\infty}$ category, has a weak proper Calabi-Yau structure of dimension n-1 whenever the original $A_{\infty}$ category admits a weak smooth Calabi-Yau stru…

Joni Ernst, your friendly neighborhood death doula

Testing Origin-of-Life Theories with the Habitable Worlds Observatory (HWO)
Sukrit Ranjan, Martin Schlecker, Nicholas Wogan, Michael Wong
https://arxiv.org/abs/2507.00164

Testing Origin-of-Life Theories with the Habitable Worlds Observatory (HWO)
The Habitable Worlds Observatory (HWO) aims to telescopically constrain the frequency and abundance of biospheres in the solar neighborhood. Origin-of-life theories vary in their predictions for the environmental requirements and the expected frequency of abiogenesis, meaning that constraints on the frequency and distribution of life on exoplanets from HWO can in principle directly test theories of abiogenesis. We categorize origin-of-life theories into three broad classes and discuss how HWO c…

This https://arxiv.org/abs/2503.14727 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_csRO_…

Beacon-Based Feedback Control for Parking an Active-Joint Center-Articulated Mobile Robot
This paper presents an autonomous parking control strategy for an active-joint center-articulated mobile robot. We first derive a kinematic model of the robot, then propose a control law to stabilize the vehicle's configuration within a small neighborhood of the goal. The control law, designed using Lyapunov techniques, is based on the robot's polar coordinate equations. A beacon-based guidance system provides feedback on the target's position and orientation. Simulations demonstrate the robot'…

Timed Prediction Problem for Sandpile Models
Pablo Concha-Vega (AMU, LIS), K\'evin Perrot (AMU, LIS)
https://arxiv.org/abs/2506.21084 https://

Timed Prediction Problem for Sandpile Models
We investigate the computational complexity of the timed prediction problem in two-dimensional sandpile models. This question refines the classical prediction problem, which asks whether a cell q will eventually become unstable after adding a grain at cell p from a given configuration. The prediction problem has been shown to be P-complete in several settings, including for subsets of the Moore neighborhood, but its complexity for the von Neumann neighborhood remains open. In a previous work, w…

This https://arxiv.org/abs/2410.00023 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_ees…

Self-Tuning Spectral Clustering for Speaker Diarization
Spectral clustering has proven effective in grouping speech representations for speaker diarization tasks, although post-processing the affinity matrix remains difficult due to the need for careful tuning before constructing the Laplacian. In this study, we present a novel pruning algorithm to create a sparse affinity matrix called spectral clustering on p-neighborhood retained affinity matrix (SC-pNA). Our method improves on node-specific fixed neighbor selection by allowing a variable number …

Optimizing Software Defined Battery Systems for Transformer Protection
Sonia Martin, Obidike Nnorom Jr., Philip Levis, Ram Rajagopal
https://arxiv.org/abs/2506.03439

Optimizing Software Defined Battery Systems for Transformer Protection
Residential electric vehicle charging causes large spikes in electricity demand that risk violating neighborhood transformer power limits. Battery energy storage systems reduce these transformer limit violations, but operating them individually is not cost-optimal. Instead of individual optimization, aggregating, or sharing, these batteries leads to cost-optimal performance, but homeowners must relinquish battery control. This paper leverages virtualization to propose battery sharing optimizati…

Shocking ⚡️

This https://arxiv.org/abs/2505.12240 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

Dynamics and leapfrogging phenomena of multiple helical vortices for 3D incompressible Euler equations
In this paper, we investigate the time evolution of multiple interacted helical vortices without swirl for the incompressible Euler equations in $\mathbb R^3$. Assuming that the initial helical symmetric vorticity is concentrated within an $\ep$ neighborhood of $N$ distinct helices with vanishing mutual distance of order $O(\frac{1}{|\ln \ep|})$, and each vortex core possesses a vorticity mass of order $O(\frac{1}{|\ln \ep|^2})$, we show that as $\ep\to 0$, the motion of the…

This https://arxiv.org/abs/2407.03078 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

Counting Rational Points In Non-Isotropic Neighborhoods of Manifolds
In this manuscript, we initiate the study of the number of rational points with bounded denominators, contained in a non-isotropic $δ_1\times\ldots\times δ_R$ neighborhood of a compact submanifold $\mathcal{M}$ of codimension $R$ in $\mathbb{R}^{M}$. We establish an upper bound for this counting function which holds when $\mathcal{M}$ satisfies a strong curvature condition, first introduced by Schindler-Yamagishi in \cite{schindler2022density}. Further, even in the isotropic case when $δ_1=\…

I just had the realization that all of the fire hydrants in my neighborhood are on the other side of the city line. 🤔

Density of Traceable Graphs
Michal Dvo\v{r}\'ak, Du\v{s}an Knop, Michal Opler, Jan Pokorn\'y, Ond\v{r}ej Such\'y, Krisztina Szil\'agyi
https://arxiv.org/abs/2506.22269

Density of Traceable Graphs
We establish tight lower and upper bounds on the number of edges in traceable graphs in several classes of dense graphs. A graph is traceable if it has a Hamiltonian path. We show that the bound is: - quadratic for the class of graphs of bounded neighborhood diversity, bounded size of maximum induced matching or bounded cluster vertex deletion number; - n log n for the class of cographs or, more generaly, bounded modular-width, and for the class of bounded distance to cograph; and - sligthly su…

Boundary bilinear control of semilinear parabolic PDEs: quadratic convergence of the SQP method
Eduardo Casas, Mariano Mateos
https://arxiv.org/abs/2505.24237

Boundary bilinear control of semilinear parabolic PDEs: quadratic convergence of the SQP method
We analyze a bilinear control problem governed by a semilinear parabolic equation. The control variable is the Robin coefficient on the boundary. First-order necessary and second-order sufficient optimality conditions are derived. A sequential quadratic programming algorithm is then proposed to compute local solutions. Starting the iterations from an initial point in an $L^2$-neighborhood of the local solution we prove stability and quadratic convergence of the algorithm in $L^p$ ($p < \infty$)…

This https://arxiv.org/abs/2502.19030 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_csSI_…

Sampling nodes and hyperedges via random walks on large hypergraphs
Hypergraphs provide a fundamental framework for representing complex systems involving interactions among three or more entities. As empirical hypergraphs grow in size, characterizing their structural properties becomes increasingly challenging due to computational complexity and, in some cases, restricted access to complete data, requiring efficient sampling methods. Random walks offer a practical approach to hypergraph sampling, as they rely solely on local neighborhood information from nodes…

Those hot MILFs in my neighborhood? Turns out they're the Red Hat Society!

This https://arxiv.org/abs/2503.05976 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

Hermitian rank in ideal powers
We prove that the (hermitian) rank of $QP^d$ is bounded from below by the rank of $P^d$ whenever $Q$ is not identically zero and real-analytic in a neighborhood of some point on the zero set of $P$ in $\mathbb{C}^n$ and $P$ is a polynomial of bidegree at most $(1,1)$. This result generalizes the theorem of D'Angelo and the second author which assumed that $P$ was bihomogeneous. Examples show that no hypothesis can be dropped.

Modeling Cosmic Ray Electron Spectra and Synchrotron Emission in the Multiphase ISM
Nora B. Linzer, Lucia Armillotta, Eve C. Ostriker, Eliot Quataert
https://arxiv.org/abs/2507.00142

Modeling Cosmic Ray Electron Spectra and Synchrotron Emission in the Multiphase ISM
We model the transport and spectral evolution of 1-100 GeV cosmic ray (CR) electrons (CREs) in TIGRESS MHD simulations of the magnetized, multiphase interstellar medium. We post-process a kpc-sized galactic disk patch representative of the solar neighborhood using a two-moment method for CR transport that includes advection, streaming, and diffusion. The diffusion coefficient is set by balancing wave growth via the CR streaming instability against wave damping (nonlinear Landau and ion-neutral …

An inverse-free fixed-time stable dynamical system and its forward-Euler discretization for solving generalized absolute value equations
Xuehua Li, Linjie Chen, Dongmei Yu, Cairong Chen, Deren Han
https://arxiv.org/abs/2507.00531

An inverse-free fixed-time stable dynamical system and its forward-Euler discretization for solving generalized absolute value equations
An inverse-free dynamical system is proposed to solve the generalized absolute value equation (GAVE) within a fixed time, where the time of convergence is finite and is uniformly bounded for all initial points. Moreover, an iterative method obtained by using the forward-Euler discretization of the proposed dynamic model are developed and sufficient conditions which guarantee that the discrete iteration globally converge to an arbitrarily small neighborhood of the unique solution of GAVE within …

I'm eating lunch at a tiny neighborhood Chinese joint and I just heard a bunch of Chinese on a duo call with "skip school" and "study" in English. 🤨

This https://arxiv.org/abs/2503.14372 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_ees…

Online ResNet-Based Adaptive Control for Nonlinear Target Tracking
A generalized ResNet architecture for adaptive control of nonlinear systems with black box uncertainties is developed. The approach overcomes limitations in existing methods by incorporating pre-activation shortcut connections and a zeroth layer block that accommodates different input-output dimensions. The developed Lyapunov-based adaptation law establishes exponential convergence to a neighborhood of the target state despite unknown dynamics and disturbances. Furthermore, the theoretical resu…

On compact sets possessing $q$-convex functions
Thomas Pawlaschyk, Nikolay Shcherbina
https://arxiv.org/abs/2505.24588 https://arxiv.…

On compact sets possessing $q$-convex functions
We show that there exists a $q$-convex function in a neighborhood of a compact set $K$ in a complex manifold $\mathcal{M}$ if and only if the $q$-nucleus of this compact set is empty. The latter can be characterized as the maximal $q$-pseudoconcave subset of $K$, i.e., a subset of $K$ containing all other compact $q$-pseudoconcave subsets in $K$.

You wouldn't know it walking around, but my neighborhood is crawling with hot MILFs. It's all over the internet.