Tootfinder

from my link log —
Tiling with three polygons is undecidable.
https://arxiv.org/abs/2409.11582
saved 2024-11-21 https://dotat.at/…

Tiling with Three Polygons is Undecidable
We prove that the following problem is co-RE-complete and thus undecidable: given three simple polygons, is there a tiling of the plane where every tile is an isometry of one of the three polygons (either allowing or forbidding reflections)? This result improves on the best previous construction which requires five polygons.

Uneven Lives VIII 👁️
不工整人生 VII 👁️
📷 Minolta Hi-Matic AF
🎞️ERA 100, expired 1994
#filmphotography #Photography #blackandwhite

The Supposed Anarchism of Jean-Paul Sartre
#Anarchism

Somos Lesbianas: Critical Reflections on Latina/e Lesbian Legacies and Futures - Edited Collection CFP
https://ift.tt/gUc8rvw
updated: Monday, October 27, 2025 - 7:29pmfull name / name of organization: Meagan Solomoncontact…
via Input 4 RELCFP

More #ThinkingOutLoud about #ArtsPedagogy. I feel like I'm starting to get somewhere and am starting to see the contours of where this can end up. Still lots of work to go, however...

Recommendations for Best Practices for Data Preservation and Open Science in HEP
Simone Campana (CERN, Switzerland), Irakli Chakaberia (Lawrence Berkeley National Laboratory, USA), Gang Chen (Institute of High Energy Physics, China), Cristinel Diaconu (Centre de Physique des Particules de Marseille CPPM, France, CNRS/IN2P3 and Aix-Marseille Universit\'e, France), Caterina Doglioni (University of Manchester, UK), Dillon S. Fitzgerald (University of Michigan, USA), Vincent Garonne (B…

Recommendations for Best Practices for Data Preservation and Open Science in HEP
These recommendations are the result of reflections by scientists and experts who are, or have been, involved in the preservation of high-energy physics data. The work has been done under the umbrella of the Data Lifecycle panel of the International Committee of Future Accelerators (ICFA), drawing on the expertise of a wide range of stakeholders. A key indicator of success in the data preservation efforts is the long-term usability of the data. Experience shows that achieving this requires pr…

The lighting is so weird in this photo that I'm actually not convinced it's not either a plastic figurine or AI.
The hair, the weird reflections on the face, the weird colour difference between hand and face, the too-crisp collar and jacket?
Seriously, is his name Gavin, or Ken?
#gavinnewsom
https://mastodon.world/@verdantsquare/115091071967593722

Quadratic BSDEs with double constraints driven by G-Brownian motion
Wei He, Qiangjun Tang
https://arxiv.org/abs/2508.18744 https://arxiv.org/pdf/2508.18744…

Quadratic BSDEs with double constraints driven by G-Brownian motion
In this paper, we investigate the well-posedness of quadratic backward stochastic differential equations driven by G-Brownian motion (referred to as G-BSDEs) with double mean reflections. By employing a representation of the solution via G-BMO martingale techniques, along with fixed point arguments, the Skorokhod problem, the backward Skorokhod problem, and the θ-method, we establish existence and uniqueness results for such G-BSDEs under both bounded and unbounded terminal conditions.

Does FLUX Already Know How to Perform Physically Plausible Image Composition?
Shilin Lu, Zhuming Lian, Zihan Zhou, Shaocong Zhang, Chen Zhao, Adams Wai-Kin Kong
https://arxiv.org/abs/2509.21278

Does FLUX Already Know How to Perform Physically Plausible Image Composition?
Image composition aims to seamlessly insert a user-specified object into a new scene, but existing models struggle with complex lighting (e.g., accurate shadows, water reflections) and diverse, high-resolution inputs. Modern text-to-image diffusion models (e.g., SD3.5, FLUX) already encode essential physical and resolution priors, yet lack a framework to unleash them without resorting to latent inversion, which often locks object poses into contextually inappropriate orientations, or brittle at…

Reflections of Sadi Carnot
M\'ario Jos\'e de Oliveira
https://arxiv.org/abs/2508.17027 https://arxiv.org/pdf/2508.17027

Reflections of Sadi Carnot
The Carnot theory is unique among the theories of heat developed before the emergence of thermodynamics because it considers the relationship between heat and work. The theory is contained in Carnot's book published in 1824, which includes the basic ideas on how thermal machines work, including the need for a temperature difference. The fundamental principle of the theory is stated with the help of a cyclic process invented by Carnot, involving two isotherms and two adiabatics. The ratio betwee…

Chris Sawyer '75 M.Div. is a conservation leader and Chair Emeritus of the YDS Dean’s Advisory Council. In this episode of "Reflections on Religion and Ecology: Yale Alumni Speak from the Field" Chris joins host Mary Evelyn Tucker to reflect on a lifetime of faith-driven leadership in #landpreservation and community renewal.

Uneven Lives VII 👁️
不工整人生 VII 👁️
📷 Minolta Hi-Matic AF
🎞️ERA 100, expired 1994
#filmphotography #Photography #blackandwhite

The meaning of prompts and the prompts of meaning: Semiotic reflections and modelling
Martin Thellefsen, Amalia Nurma Dewi, Bent Sorensen
https://arxiv.org/abs/2509.14250 https:…

The meaning of prompts and the prompts of meaning: Semiotic reflections and modelling
This paper explores prompts and prompting in large language models (LLMs) as dynamic semiotic phenomena, drawing on Peirce's triadic model of signs, his nine sign types, and the Dynacom model of communication. The aim is to reconceptualize prompting not as a technical input mechanism but as a communicative and epistemic act involving an iterative process of sign formation, interpretation, and refinement. The theoretical foundation rests on Peirce's semiotics, particularly the interplay between …

Reflections on seven years of writing CJR's The Media Today, highlighting the evolving media landscape and shifts in press coverage during Trump's presidencies (Jon Allsop/Columbia Journalism Review)
https://www.cjr.org/the_media_today/the-li

The line.
Some final reflections on seven years of writing CJR’s newsletter.

Bridging continents through connectivity 🌍
Through the GÉANT Twinning Programme, a collaboration between Jisc and KENET brought #eduroam to one of Kenya’s most remote research sites—proving how global NREN partnerships can transform access to connectivity.
🔗 Read the full story, detailed results, and reflections from Peter Kent (Jisc):

I've expanded a bit on my reflections about #inaturalist's push for using LLMs to regurgitate user-generated insights - and why replacing human peer-to-peer learning is likely harmful to people's motivations.
Read it here: #citizenscience

This Is Not the World I Wanted to Leave for You: Reflections on Legacy, Loss, and the Future We Shape
I have been thinking a great deal lately about living and dying, and about the strange, stubborn human hunger to leave something meaningful behind. The faces of those I have known who have already passed return to me in quiet moments, and I find myself watching those who are, even now, nearing the end of their own stories. I also include my final braided prairie knot…

🇺🇦 #NowPlaying on #BBC6Music's #FocusBeats
Low Heat:
🎵 Water Reflections
#LowHeat
https://wearestereofox.bandcamp.com/track/low-heat-water-reflections
https://open.spotify.com/track/59Kkk6OH3GTVBi7gErEngI

This is a really cool insight about talking to people who like to use Midjourney/ChatGPT. The comparison with plastic use (and also car dependency) is great. For both of these things we know that they waste precious resources, pollute the environment and are health hazards. But even people who know this will still not let go because it's too much work. AI is not yet at this point but may soon be...

Uneven Lives VI 👁️
不工整人生 VI 👁️
📷 Minolta Hi-Matic AF
🎞️ERA 100, expired 1994
#filmphotography #Photography #blackandwhite

Good morning!
Here are some photos from the #Mummelsee in the #Schwarzwald . We wanted to visit it last year already but somehow just managed to go there this time.
The lake itself is scenic and beautiful. But definitely a "hot spot". Luckily we were there at a day/time w…

In monochrome you can't see the iridescence of the plastic films in the Polyform sculpture in front of the Human Ecology building it making it look like a glass cube with a stainless steel foam inside
#photo #photography

🇺🇦 #NowPlaying on KEXP's #PacificNotions
Steve Roach:
🎵 Reflections in Suspension
#SteveRoach
https://projektrecords.bandcamp.com/track/reflections-in-suspension-2
https://open.spotify.com/track/6qdwDI0a8FJMSOl4lr6ghT

Video interview with Julia Johnson '18 M.Div. on faith, farming, and the sacredness of food systems. Part of the new series from the Yale Forum on Religion and Ecology on alums pursuing callings at the intersection of spiritual traditions and environmental stewardship. #ecotheology

More reflections on the philosophy of #degrowth from the European periphery, by Mladen Domazet.
Struggle for Justice, Freedom and Beauty as Denial of Despair  - Kronika
https://

50 years ago today, the last known #GratefulDead session from bob weir’s ace’s studio in mill valley, for jerry garcia’s in-progress “reflections” album, a ‘70s/early ‘80s garcia standard never played live by the dead. https://

Good afternoon!

Some Reflections on Sliding Mode Designs in Control Systems: An Example of Adaptive Tracking Control for Simple Mechanical Systems With Friction Without Measurement of Velocity
Romeo Ortega, Leyan Fang, Jose Guadalupe Romero
https://arxiv.org/abs/2510.07675

Some Reflections on Sliding Mode Designs in Control Systems: An Example of Adaptive Tracking Control for Simple Mechanical Systems With Friction Without Measurement of Velocity
The objective of this note is to share some reflections of the authors regarding the use of sliding mode designs in control systems. We believe the abundant, and ever increasing, appearance of this kind of works on our scientific publications deserves some critical evaluation of their actual role, relevance and pertinence. First, we discuss the procedure followed by most of these designs -- illustrated with examples from the literature. Second, we bring to the readers attention several aspects …

Governments freeloading on FOSS, not helping with funding (and at the same time collecting taxes on income/donations sourced otherwise) are just as exploitative as privately held companies, maybe even worse...
https://scalie.zone/@aks/115012388922867133

Ugh. The rain that was supposed to stop imminently, well, it intensified instead. At one point, I could hardly open my eyes. So I decided not to go with HR zone 2 training tonight and just get it done.
But it was too soon after dinner and I cramped. I didn’t sleep well last night and my HR spiked, like it does in those scenarios. Walked for a short spell late to bring it back down.
Oh, and it stopped raining on my last lap. 🙃
Still, like dogs, all runs are good runs.

Counting factorizations of Singer cycles in linear and unitary groups
Joel Brewster Lewis, C. Ryan Vinroot
https://arxiv.org/abs/2509.02725 https://arxiv.o…

Counting factorizations of Singer cycles in linear and unitary groups
We count factorizations of Singer cycles as products of reflections in the families of special and general unitary and linear groups over a finite field. In the case of minimum-length factorizations, the resulting answer is a striking product formula resembling the count for minimum-length factorizations of Coxeter elements into reflections in complex reflections groups. Moreover, for minimum length, the answers for the unitary and linear groups exhibit the phenomenon of Ennola duality, where t…

Lie Superalgebras Generated by Reflections in Weyl Groups of Classical Type
Christopher M. Drupieski, Jonathan R. Kujawa
https://arxiv.org/abs/2509.00945 https://

Lie Superalgebras Generated by Reflections in Weyl Groups of Classical Type
We consider the finite Weyl groups of classical type -- $W(A_{r})$ for $r \geq 1$, $W(B_{r}) = W(C_{r})$ for $r \geq 2$, and $W(D_{r})$ for $r \geq 4$ -- as supergroups in which the reflections are of odd superdegree. Viewing the corresponding complex group algebras as Lie superalgebras via the graded commutator bracket, we determine the structure of the Lie sub-superalgebras generated by the sets of reflections. In each case, this Lie superalgebra is equal to the full derived subalgebra of the…

My Carpe Iter is easier to read with a glossy screen protector on, rather than the frosted one.
Yes, there are reflections but only the same as there are from the KTM dash directly below it.
#Motorcycles

Indoor Fluid Antenna Systems Enabled by Layout-Specific Modeling and Group Relative Policy Optimization
Tong Zhang, Qianren Li, Shuai Wang, Wanli Ni, Jiliang Zhang, Rui Wang, Kai-Kit Wong, Chan-Byoung Chae
https://arxiv.org/abs/2509.15006

Indoor Fluid Antenna Systems Enabled by Layout-Specific Modeling and Group Relative Policy Optimization
The fluid antenna system (FAS) revolutionizes wireless communications by employing position-flexible antennas that dynamically optimize channel conditions and mitigate multipath fading. This innovation is particularly valuable in indoor environments, where signal propagation is severely degraded due to structural obstructions and complex multipath reflections. In this paper, we study the channel modeling and joint optimization of antenna positioning, beamforming, and power allocation for indoor…

GOGS: High-Fidelity Geometry and Relighting for Glossy Objects via Gaussian Surfels
Xingyuan Yang, Min Wei
https://arxiv.org/abs/2508.14563 https://arxiv.o…

GOGS: High-Fidelity Geometry and Relighting for Glossy Objects via Gaussian Surfels
Inverse rendering of glossy objects from RGB imagery remains fundamentally limited by inherent ambiguity. Although NeRF-based methods achieve high-fidelity reconstruction via dense-ray sampling, their computational cost is prohibitive. Recent 3D Gaussian Splatting achieves high reconstruction efficiency but exhibits limitations under specular reflections. Multi-view inconsistencies introduce high-frequency surface noise and structural artifacts, while simplified rendering equations obscure mate…

Mean-field BSDEs with non-Lipschitz coefficients and double mean reflections
Li Hanwu, Shi Jin
https://arxiv.org/abs/2510.11228 https://arxiv.org/pdf/2510.…

Mean-field BSDEs with non-Lipschitz coefficients and double mean reflections
The present paper is devoted to the study of mean-field backward stochastic differential equations (MFBSDEs) with double mean reflections whose generators are not Lipschitz continuous. With the help of the Skorokhod problem and some a priori estimates for MFBSDEs, we establish the existence and uniqueness results for doubly mean reflected MFBSDEs.

Moody Urbanity - Metro Consistency 🏁
情绪化城市 - 都市质地 🏁
📷 Pentax MX
🎞️ Orwo Wolfen P400
#filmphotography #Photography #blackandwhite

Scaling Accessibility Education: Reflections from a Workshop Targeting CS Educators and Software Professionals
P D Parthasarathy, Anshu M Mittal, Swaroop Joshi
https://arxiv.org/abs/2509.22759

Scaling Accessibility Education: Reflections from a Workshop Targeting CS Educators and Software Professionals
Despite growing global attention to digital accessibility, research from India highlights a significant gap in accessibility training for both computing educators and software professionals. To address this need, we designed and conducted an experiential workshop aimed at building foundational capacity in accessibility practices among 77 participants, including computer science (CS) faculty and industry practitioners. The one-day workshop combined hands-on activities, tool demonstrations, and c…

Would you ride this?
#BikeTooter #bike #vintage

Identifying Framing Practices in Visualization Design Through Practitioner Reflections
Prakash Shukla, Paul Parsons
https://arxiv.org/abs/2508.20383 https://

Identifying Framing Practices in Visualization Design Through Practitioner Reflections
Framing -- how designers define and reinterpret problems, shape narratives, and guide audience understanding -- is central to design practice. Yet in visualization research, framing has been examined mostly through its rhetorical and perceptual effects on audiences, leaving its role in the design process underexplored. This study addresses that gap by analyzing publicly available podcasts and book chapters in which over 80 professional visualization designers reflect on their work. We find that…

Optical Cavity in Relativistic Regime for Laser Propulsion
Francesco Lorenzi, Luca Salasnich, Maria Guglielmina Pelizzo
https://arxiv.org/abs/2508.12442 https://

Optical Cavity in Relativistic Regime for Laser Propulsion
Laser propulsion has been proposed for relativistic interstellar flights, but it faces the significant challenge of requiring extremely powerful laser radiation due to the inherently low momentum transfer between the beam and the sail. The photon-recycling technique enhances thrust by transferring momentum through multiple reflections within a cavity setup, formed by the lightsail and a ground-based mirror in a laser system array. In this work, a delay differential model is developed to describ…

DEQuify your force field: More efficient simulations using deep equilibrium models
Andreas Burger, Luca Thiede, Al\'an Aspuru-Guzik, Nandita Vijaykumar
https://arxiv.org/abs/2509.08734

DEQuify your force field: More efficient simulations using deep equilibrium models
Machine learning force fields show great promise in enabling more accurate molecular dynamics simulations compared to manually derived ones. Much of the progress in recent years was driven by exploiting prior knowledge about physical systems, in particular symmetries under rotation, translation, and reflections. In this paper, we argue that there is another important piece of prior information that, thus fa,r hasn't been explored: Simulating a molecular system is necessarily continuous, and suc…

Cone-dependent retro and specular Andreev reflections in AA-stacked bilayer graphene
Wei-Tao Lu, Qing-Feng Sun
https://arxiv.org/abs/2509.04841 https://arx…

Cone-dependent retro and specular Andreev reflections in AA-stacked bilayer graphene
We theoretically study the Andreev reflection (AR) in AA-stacked bilayer graphene/superconductor (AABG/SC) junction. AABG has a linear gapless energy band with two shifted Dirac cones and the electronic states are described by the cone indices. The results indicate that the property of AR strongly depends on the cone degree of freedom. In the absence of the inter-layer potential difference, only intra-cone AR and normal reflection (NR) could occur, and the inter-cone process is forbidden. By ad…

First Try Matters: Revisiting the Role of Reflection in Reasoning Models
Liwei Kang, Yue Deng, Yao Xiao, Zhanfeng Mo, Wee Sun Lee, Lidong Bing
https://arxiv.org/abs/2510.08308 h…

First Try Matters: Revisiting the Role of Reflection in Reasoning Models
Large language models have recently demonstrated significant gains in reasoning ability, often attributed to their capacity to generate longer chains of thought and engage in reflective reasoning. However, the contribution of reflections to performance improvement remains unclear. In this paper, we systematically analyze the rollouts of eight reasoning models on five mathematical datasets. We focus on reflective behaviours where the model has already produced an answer but continues reflecting …

From celebrations to frustration, guess who said what in NFL Week 1 https://www.espn.com/nfl/story/_/id/46201499/who-said-nfl-week-1-2025-best-quotes-quiz

Equal-spin and oblique-spin crossed Andreev reflections in ferromagnet/Ising superconductor/ferromagnet junction
Wei-Tao Lu, Qing-Feng Sun, Qiang Cheng
https://arxiv.org/abs/2509.04840

Equal-spin and oblique-spin crossed Andreev reflections in ferromagnet/Ising superconductor/ferromagnet junction
We study the subgap transport through a ferromagnet/Ising superconductor/ferromagnet (F/ISC/F) junction by solving the Bogoliubov-de Gennes equations. It is found that the crossed Andreev reflection (CAR) and local Andreev reflection (LAR) strongly depend on the spin polarized F, the magnetization direction, and the Ising superconducting phase. For the same magnetization directions of the two F leads, the equal-spin CAR could take place due to spin-flip mechanism induced by the Ising spin-orbit…

On The Road - To Xi’An/ Departure II 🔜
在路上 - 去西安/ 离 II 🔜
📷 Pentax MX
🎞️Kodak Double-X 5222
#filmphotography #Photography #blackandwhite

Day two of my east-west road trip and got up early in a brisk minus 2C to get some shots of Pink Lake, about 10km from Jimboomba. Great reflections before the sunrise burnt the mist off. #RoadTrip

Bird Photographer of the Year winners, and even highly commended shots for 2025 are all incredibly epic (as usual)
#photography

Observability of radio reflections from exoplanet ionospheres with next generation radio telescopes
Bhavesh Jaiswal, Nirupam Roy
https://arxiv.org/abs/2507.20978 https://…

Observability of radio reflections from exoplanet ionospheres with next generation radio telescopes
Much has been learned about exoplanets and their atmospheres in the last three decades with the help of highly sensitive optical telescopes. Limited observations using X-ray telescopes have revealed the presence of ionospheres with very high density plasma around the hot Jupiter HD189733b. Owing to high density, the cutoff frequency of this plasma would lie in the range of few GHz. As the planet goes around the star, we suggest it might be possible to capture the stellar radio emission reflecte…

Rigid-Invariant Sliced Wasserstein via Independent Embeddings
Peilin He, Zakk Heile, Jayson Tran, Alice Wang, Shrikant Chand
https://arxiv.org/abs/2510.10233 https://

Rigid-Invariant Sliced Wasserstein via Independent Embeddings
Comparing probability measures when their supports are related by an unknown rigid transformation is an important challenge in geometric data analysis, arising in shape matching and machine learning. Classical optimal transport (OT) distances, including Wasserstein and sliced Wasserstein, are sensitive to rotations and reflections, while Gromov-Wasserstein (GW) is invariant to isometries but computationally prohibitive for large datasets. We introduce \emph{Rigid-Invariant Sliced Wasserstein vi…

The minimal covolume right-angled Coxeter group in hyperbolic 3-space
A. Egorov, A. Vesnin
https://arxiv.org/abs/2509.09261 https://arxiv.org/pdf/2509.0926…

The minimal covolume right-angled Coxeter group in hyperbolic 3-space
We prove that among all right-angled Coxeter groups in hyperbolic 3-space, the group generated by reflections in the faces of a right-angled triangular bipyramid with three ideal and two finite vertices has the smallest covolume. The group is arithmetic and its covolume equals Catalan's constant G = 0.915965....

My Carpe Iter is easier to read with a glossy screen protector on, rather than the frosted one.
Yes, there are reflections but only the same as there are from the KTM dash directly below it.
#Motorcycles

Uneven Lives IV 👁️
不工整人生 IV 👁️
📷 Minolta Hi-Matic AF
🎞️ERA 100, expired 1994
#filmphotography #Photography #blackandwhite

In this episode of "Reflections on Religion and Ecology: Yale Alumni Speak from the Field," Stephen Blackmer '12 M.A.R.—forest conservationist, Episcopal priest (now former), and founder of Church of the Woods—joins host Tali Anisfeld for a deeply contemplative conversation on trees, prophecy, and spiritual communion with the Earth.
View the interview here:

Ghost Points Matter: Far-Range Vehicle Detection with a Single mmWave Radar in Tunnel
Chenming He, Rui Xia, Chengzhen Meng, Xiaoran Fan, Dequan Wang, Haojie Ren, Jianmin Ji, Yanyong Zhang
https://arxiv.org/abs/2509.06639

Ghost Points Matter: Far-Range Vehicle Detection with a Single mmWave Radar in Tunnel
Vehicle detection in tunnels is crucial for traffic monitoring and accident response, yet remains underexplored. In this paper, we develop mmTunnel, a millimeter-wave radar system that achieves far-range vehicle detection in tunnels. The main challenge here is coping with ghost points caused by multi-path reflections, which lead to severe localization errors and false alarms. Instead of merely removing ghost points, we propose correcting them to true vehicle positions by recovering their signal…

Interfacing of an Optical Nanofiber with Tunably Spaced Atoms in an Optical Lattice
Hyok Sang Han, Ahreum Lee, Sarthak Subhankar, Fredrik K. Fatemi, S. L. Rolston
https://arxiv.org/abs/2509.22958

Interfacing of an Optical Nanofiber with Tunably Spaced Atoms in an Optical Lattice
We experimentally demonstrate efficient interfacing of a large number of atoms to an optical nanofiber using an optical lattice with tunable spacing ($0.88-1.5~μ$m) [1] projected onto the nanofiber. The lattice beam and reflections from the nanofiber yield trap potentials that provide tight confinement in all motional degrees of freedom $\approx 220$ nm above the nanofiber surface, enabling efficient atom-photon coupling. We achieved trapping of $\approx1300$ atoms in periodic trap sites with …

The new Compendium is here, and it’s more than just data. [Part 1]
Created by and for the #NREN community, this year’s edition brings the 2024 survey results to life through stories, context, and reflections from NRENs and expert contributors.
🔗 Read the report and explore the data:

🇺🇦 #NowPlaying on BBCRadio3's #SaturdayMorning
John Rutter, Royal Philharmonic Orchestra & John Rutter:
🎵 Reflections: I. Prelude
#JohnRutter #RoyalPhilharmonicOrchestra

Protecting the Amazon: Indigenous voices leading the way in the fight against climate change. #climatechange #climatesolutions #climate

Voices from the land: Seven Indigenous paths to protect the Amazon (commentary)
This series, Voices from the Land, brings together opinion pieces led and written by Indigenous peoples from around the world. Through these commentaries, we share our lived realities and reflections on urgent issues shaping our time — environmental destruction, our relationship with nature, and systemic injustice. We write from the heart of our communities, where […]

🇺🇦 #NowPlaying on KEXP's #PacificNotions
Ryuuta Takaki:
🎵 Funnel and Infinite Reflections
#RyuutaTakaki

The $K(\pi, 1)$ conjecture for affine Artin groups
Giovanni Paolini, Mario Salvetti
https://arxiv.org/abs/2509.00445 https://arxiv.org/pdf/2509.00445

The $K(π, 1)$ conjecture for affine Artin groups
In this summary paper, we present the key ideas behind the recent proof of the $K(π, 1)$ conjecture for affine Artin groups, which states that complements of locally finite affine hyperplane arrangements with real equations and stable under orthogonal reflections are aspherical. We survey three facets of the argument: the combinatorics of noncrossing partition posets associated with Coxeter groups; the appearance of dual Artin groups and the question of their isomorphism with standard Artin gr…

Hurricane Katrina's 20-year anniversary prompts at least seven new documentaries, as well as reflections on criticisms of the press coverage after the storm (Jon Allsop/Columbia Journalism Review)
https://www.cjr.org/the_media_today/hurric

Katrina and the Press, Twenty Years On
Race, climate, and the media legacy of an “unnatural” disaster.

Not quite Canadian Shield, but close... and at much higher elevation (~2300m)
(Another impression from the same region from yesterday's pictures, see description there...)
#MountainMonday #LandscapePhotography

Fabry-Perot interference in three dimensional second-order topological insulator constrictions
Junyu Luo, Kun Luo
https://arxiv.org/abs/2508.12655 https://…

Fabry-Perot interference in three dimensional second-order topological insulator constrictions
The gapless chiral hinge states of three dimensional second-order topological insulators (SOTIs) support a quantized conductance plateau on thick nanowire. Here, we numerical study the conductance of SOTI constrictions. According to finite size effects, the hinge states in narrow region could be hybridized, which will induce reflection at the two ends of constrictions. The conductance exists the Fabry-Perot oscillation pattern because of multiple reflections. We also study the impact of the mag…

SwizzlePerf: Hardware-Aware LLMs for GPU Kernel Performance Optimization
Arya Tschand, Muhammad Awad, Ryan Swann, Kesavan Ramakrishnan, Jeffrey Ma, Keith Lowery, Ganesh Dasika, Vijay Janapa Reddi
https://arxiv.org/abs/2508.20258

SwizzlePerf: Hardware-Aware LLMs for GPU Kernel Performance Optimization
Large language models (LLMs) have shown progress in GPU kernel performance engineering using inefficient search-based methods that optimize around runtime. Any existing approach lacks a key characteristic that human performance engineers rely on for near-optimal utilization -- hardware-awareness. By leveraging the workload's specific memory access patterns, architecture specifications, filtered profiling logs, and reflections on historical performance, we can make software-level optimizations t…

Mean Field Game with Reflected Jump Diffusion Dynamics: A Linear Programming Approach
Zongxia Liang, Xiang Yu, Keyu Zhang
https://arxiv.org/abs/2508.20388 https://

Mean Field Game with Reflected Jump Diffusion Dynamics: A Linear Programming Approach
This paper develops a linear programming approach for mean field games with reflected jump-diffusion state dynamices. The jump component is driven by a Poisson process with time-varying intensity, and the multi-dimensional reflections enforce the state process to stay in a bounded domain. We first prove the equivalence between the mean field equilibria in the linear programming formulation and those in the weak relaxed control formulation under some measurability conditions on model coefficient…

AWARE, Beyond Sentence Boundaries: A Contextual Transformer Framework for Identifying Cultural Capital in STEM Narratives
Khalid Mehtab Khan, Anagha Kulkarni
https://arxiv.org/abs/2510.04983

AWARE, Beyond Sentence Boundaries: A Contextual Transformer Framework for Identifying Cultural Capital in STEM Narratives
Identifying cultural capital (CC) themes in student reflections can offer valuable insights that help foster equitable learning environments in classrooms. However, themes such as aspirational goals or family support are often woven into narratives, rather than appearing as direct keywords. This makes them difficult to detect for standard NLP models that process sentences in isolation. The core challenge stems from a lack of awareness, as standard models are pre-trained on general corpora, leav…

Placid pond with rocks and reflections. And a duck. #laarboretum #landscape #pond #reflections

Learning Object-Centric Representations in SAR Images with Multi-Level Feature Fusion
Oh-Tae Jang, Min-Gon Cho, Kyung-Tae Kim
https://arxiv.org/abs/2509.09298 https://

Learning Object-Centric Representations in SAR Images with Multi-Level Feature Fusion
Synthetic aperture radar (SAR) images contain not only targets of interest but also complex background clutter, including terrain reflections and speckle noise. In many cases, such clutter exhibits intensity and patterns that resemble targets, leading models to extract entangled or spurious features. Such behavior undermines the ability to form clear target representations, regardless of the classifier. To address this challenge, we propose a novel object-centric learning (OCL) framework, named…

Reflection Before Action: Designing a Framework for Quantifying Thought Patterns for Increased Self-awareness in Personal Decision Making
Morita Tarvirdians, Senthil Chandrasegaran, Hayley Hung, Catholijn M. Jonker, Catharine Oertel
https://arxiv.org/abs/2510.04364

Reflection Before Action: Designing a Framework for Quantifying Thought Patterns for Increased Self-awareness in Personal Decision Making
When making significant life decisions, people increasingly turn to conversational AI tools, such as large language models (LLMs). However, LLMs often steer users toward solutions, limiting metacognitive awareness of their own decision-making. In this paper, we shift the focus in decision support from solution-orientation to reflective activity, coining the term pre-decision reflection (PDR). We introduce PROBE, the first framework that assesses pre-decision reflections along two dimensions: br…

Computing the number of realisations of a rigid graph
Sean Dewar, Georg Grasegger, Josef Schicho, Ayush Kumar Tewari, Audie Warren
https://arxiv.org/abs/2510.02988 https://

Computing the number of realisations of a rigid graph
A graph is said to be rigid if, given a generic realisation of the graph as a bar-and-joint framework in the plane, there exist only finitely many other realisations of the graph with the same edge lengths modulo rotations, reflections and translations. In recent years there has been an increase of interest in determining exactly what this finite amount is, hereon known as the realisation number. Combinatorial algorithms for the realisation number were previously known for the special cases of …

Reflections on the Erie Canal [FULL DOCUMENTARY]
In 1825, the state of New York completed the Erie Canal. Today, the singular historic purpose of the canal has been replaced by a broader significance.
https://www.youtube.com/watch?v=Iqfe7grWuNU

City Features VIII 👣
城市特征 VIII 👣
📷 Nikon FE
🎞️Ilford FP4 Plus, expired 1994
buy me ☕️ ?/请我喝杯☕️？
#filmphotography

Replaced article(s) found for cs.CV. https://arxiv.org/list/cs.CV/new
[2/4]:
- RGS-DR: Deferred Reflections and Residual Shading in 2D Gaussian Splatting
Georgios Kouros, Minye Wu, Tinne Tuytelaars

An elementary classification of the quaternionic reflection groups of rank two
Shayne Waldron
https://arxiv.org/abs/2509.01849 https://arxiv.org/pdf/2509.0…

An elementary classification of the quaternionic reflection groups of rank two
We give an elementary classification and presentation of the finite quaternionic reflection groups of rank two, based on the notion of a``reflection system''. This simplifies the existing classification, which is shown to be incomplete, e.g., there exist four imprimitive quaternionic reflection groups of order 192 with 22 reflections which are not isomorphic (one of which was previously unknown).

Integrated broadband optical isolator via dynamic rotating destructive interference
Kyunghun Han, Yiliang Bao, Junyeob Song, David Long, Sean Bresler, Daron Westly, Jason Gorman, Thomas LeBrun, Kartik Srinivasan, Vladimir Aksyuk
https://arxiv.org/abs/2509.02866

Integrated broadband optical isolator via dynamic rotating destructive interference
Photonic integrated circuits route and shape light on a chip, but back-reflections feed back into coherent on-chip lasers, destabilizing operation and corrupting signals. Robust operation requires an integrated optical isolator that strongly suppresses backward propagation while maintaining low-loss, broadband forward transmission. However, prior on-chip isolators rely on magneto-optic materials or resonance-based filters, which respectively demand non-standard processes or inherently constrain…

Hyperplane arrangements and Vinberg's $\theta$-groups
Filippo Ambrosio, Andrea Santi
https://arxiv.org/abs/2509.04284 https://arxiv.org/pdf/2509.04284

Hyperplane arrangements and Vinberg's $θ$-groups
Let $\mathfrak{g} = \bigoplus_{i \in \mathbb{Z} /m \mathbb{Z}} \mathfrak{g}_i$ be a periodically graded semisimple complex Lie algebra. In this note, we give a uniform proof of the recent result by W. de Graaf and H. V. Lê that the hyperplane arrangement determined by the restrictions of the roots of $\mathfrak{g}$ to a Cartan subspace $\mathfrak{c} \subset \mathfrak{g}_1$ coincides with the hyperplane arrangement of (complex) reflections of the little Weyl group of $\mathfrak{g} = \bigoplus_{…

Second-timescale Glints from Satellites and Space Debris Detected with Tomo-e Gozen
Masaomi Tanaka, Ichiro Takahashi, Naoki Yoshida, Naonori Ueda, Akisato Kimura, Kazuma Mitsuda, Hirofumi Noda, Shigeyuki Sako, Noriaki Arima, Mitsuru Kokubo, Tomoki Morokuma, Yuu Niino, Nozomu Tominaga, Kenzo Kinugasa, Naoto Kobayashi, Sohei Kondo, Yuki Mori, Ryou Ohsawa, Hidenori Takahashi, Satoshi Takita

Second-timescale Glints from Satellites and Space Debris Detected with Tomo-e Gozen
A search for second-timescale optical transients is one of the frontiers of time-domain astronomy. However, it has been pointed out that reflections of sunlight from Earth-orbiting objects can also produce second-timescale ``glints.'' We conducted wide-field observations at 2 frames per second using Tomo-e Gozen on the 1.05 m Kiso Schmidt telescope. We identified 1554 point-source glints that appeared in only one frame (0.5 sec). Their brightness ranges from 11 to 16 mag, with fainter glints be…

Non-Destructive Rail Monitoring for Defect Identification
Elissa Akiki (TPIA - IEMN, IEMN), Lynda Chehami (TPIA - IEMN, IEMN), Nikolay Smagin (TPIA - IEMN, IEMN), Emmanuel Moulin (TPIA - IEMN, IEMN), Jamal Assaad, Youssef Zaatar
https://arxiv.org/abs/2509.06394

Non-Destructive Rail Monitoring for Defect Identification
Non-destructive evaluation (NDE) of rail tracks is crucial to ensure the safety and reliability of rail transportation systems. In this work, we present a quantitative study using various signal processing methods to identify defects in rail structures. A diffuse field configuration was employed at few dozens of kiloHertz, where the emitter and receiver were remotely located, and wave energy propagated via multiple reflections within the medium. A reference database is first constructed by acqu…

On The Road - To Xi’An/ Geometry 📐
在路上 - 去西安/ 几何 📐
📷 Pentax MX
🎞️Fujifilm Neopan F, expired 1993
#filmphotography #Photography #blackandwhite

The Languages of Fashion: Critical Reflections on Fashion Discourses
https://ift.tt/5NwA2o3
updated: Tuesday, October 7, 2025 - 12:43pmfull name / name of organization: Fashion Highlight…
via Input 4 RELCFP

Constrained Dikin-Langevin diffusion for polyhedra
James Chok, Domenic Petzinna
https://arxiv.org/abs/2510.04582 https://arxiv.org/pdf/2510.04582

Constrained Dikin-Langevin diffusion for polyhedra
Interior-point geometry offers a straightforward approach to constrained sampling and optimization on polyhedra, eliminating reflections and ad hoc projections. We exploit the Dikin log-barrier to define a Dikin--Langevin diffusion whose drift and noise are modulated by the inverse barrier Hessian. In continuous time, we establish a boundary no-flux property; trajectories started in the interior remain in $U$ almost surely, so feasibility is maintained by construction. For computation, we adopt…

Transition to chaos with conical billiards
Lara Braverman, David R. Nelson
https://arxiv.org/abs/2508.02786 https://arxiv.org/pdf/2508.02786

Transition to chaos with conical billiards
We adapt ideas from geometrical optics and classical billiard dynamics to consider particle trajectories with constant velocity on a cone with specular reflections off an elliptical boundary formed by the intersection with a tilted plane, with tilt angle $γ$. We explore the dynamics as a function of $γ$ and the cone deficit angle $χ$ that controls the sharpness of the apex, where a point source of positive Gaussian curvature is concentrated. We find regions of the ($γ, χ$) plane where, dep…

The Invisible Mentor: Inferring User Actions from Screen Recordings to Recommend Better Workflows
Litao Yan, Andrew Head, Ken Milne, Vu Le, Sumit Gulwani, Chris Parnin, Emerson Murphy-Hill
https://arxiv.org/abs/2509.26557

The Invisible Mentor: Inferring User Actions from Screen Recordings to Recommend Better Workflows
Many users struggle to notice when a more efficient workflow exists in feature-rich tools like Excel. Existing AI assistants offer help only after users describe their goals or problems, which can be effortful and imprecise. We present InvisibleMentor, a system that turns screen recordings of task completion into vision-grounded reflections on tasks. It detects issues such as repetitive edits and recommends more efficient alternatives based on observed behavior. Unlike prior systems that rely o…

🇺🇦 #NowPlaying on BBCRadio3's #EssentialClassics
John Rutter, Steven Osborne, Royal Philharmonic Orchestra & John Rutter:
🎵 Reflections: IV. Finale alla burlesca
#JohnRutter #StevenOsborne #RoyalPhilharmonicOrchestra
https://open.spotify.com/track/0YU8Cis6D6l3FhDDDdnZTZ

City Features V 🌆
城市特征 V 🌆
📷 Nikon FE
🎞️Ilford FP4 Plus, expired 1994
buy me ☕️ ?/请我喝杯☕️？
#filmphotography

Looking North from the South End of Dryden Lake
#photo #photography #landscape #lake

City Snaps - Chengdu / A Rain in Park ☔️
城市抓拍 - 成都 / 雨中的公园 ☔️
📷 Nikon FE
🎞️Ilford Pan 400
buy me ☕️ ?/请我喝杯☕️？
#filmphotography

City Snaps - Chengdu / A Rain in Park ☔️
城市抓拍 - 成都 / 雨中的公园 ☔️
📷 Nikon FE
🎞️Ilford Pan 400
buy me ☕️ ?/请我喝杯☕️？
#filmphotography

Purple flower by the inlet on Ithaca's waterfront with Cayuga Lake
#photo #photography #flowers #bloomscrolling

Urban Diaspora 7️⃣
城市放逐 7️⃣
📷 Nikon FE
🎞️Ilford FP4 Plus, expired 1994
buy me ☕️ ?/请我喝杯☕️？
#filmphotography

On The Road - Train to Xi’An II 🚞
在路上 - 去西安的火车 II 🚞
📷 Minolta Hi-Matic AF
🎞️Kentmere Pan 200
#filmphotography #Photography #blackandwhite

Students hang out above dam in Six Mile Creek
#photo #photography #landscape #streetphotography