Tootfinder

Anyone know what causes OPEN_ID_ERROR when trying to call on matrix?
Using continuwuity server with livekit, client is element X. The call appears to take ages to connect then errors after about 10 seconds with OPEN_ID_ERROR. Any ideas?
#matrix #element

I've been sending some minor contributions to Mactrix, which is highlighted in TWIM: https://matrix.org/blog/2026/02/27/this-week-in-matrix-2026-02-27/#mactrix (Drafts was me; @…

This Week in Matrix 2026-02-27
Matrix, the open protocol for secure decentralised communications

IRCv3 is better than Matrix or xmpp
Easier to host, easier to moderate & is able to run on 20year old hardware
#irc #matrix #xmpp

Joker meets The Matrix vibes.
#TOTP

Microsoft destroying their own Discord to silence the #Microslop roasting be

Fast Sparse Matrix Permutation for Mesh-Based Direct Solvers
Behrooz Zarebavami, Ahmed H. Mahmoud, Ana Dodik, Changcheng Yuan, Serban D. Porumbescu, John D. Owens, Maryam Mehri Dehnavi, Justin Solomon
https://arxiv.org/abs/2602.00898 https://arxiv.org/pdf/2602.00898 https://arxiv.org/html/2602.00898
arXiv:2602.00898v1 Announce Type: new
Abstract: We present a fast sparse matrix permutation algorithm tailored to linear systems arising from triangle meshes. Our approach produces nested-dissection-style permutations while significantly reducing permutation runtime overhead. Rather than enforcing strict balance and separator optimality, the algorithm deliberately relaxes these design decisions to favor fast partitioning and efficient elimination-tree construction. Our method decomposes permutation into patch-level local orderings and a compact quotient-graph ordering of separators, preserving the essential structure required by sparse Cholesky factorization while avoiding its most expensive components. We integrate our algorithm into vendor-maintained sparse Cholesky solvers on both CPUs and GPUs. Across a range of graphics applications, including single factorizations, repeated factorizations, our method reduces permutation time and improves the sparse Cholesky solve performance by up to 6.27x.
toXiv_bot_toot

TIL this doc is inaccurate https://rocm.docs.amd.com/en/latest/compatibility/compatibility-matrix.html#compatibility-matrix
I can’t even install graphics drivers for RDNA4 on

Lightning round privacy guide
https://microblog.jackiejude.me/posts/202602021855/

Ich habe jetzt auf 2 Servern Matrix mit dem neuen WebRTC-Livekit Videocall und hab jetzt ne Gruppe von 6 Leuten die da ein professionelles Meeting abhält. alles Gutgemacht ~

I spend a bit of time today reading into Matrix and Jabber etc. I also watched some videos about the signup process (to see how easy it is).
Und just when I spoke with my wife about it, I noticed what "felt wrong" when seeing them as alternatives to signal/Whatsapp/...: The signup requires eMail.
When looking for a replacement of the classical messengers, I would expect that I signup by phone number and find contacts via my address book (email / phone).
Need to …

PS. With all the Discord stuff, in case you wonder why you never see me promoting Matrix, it’s not because it’s a usability nightmare (which it is) but because it’s made by the kind of people who’d be happy to call ICE a customer.
The “F” in FOSS doesn’t stand for fascism.
@…

DG Matrix, which builds solid-state transformers to handle up to 2.4 MW and boost data center power efficiency, raised a $60M Series A led by Engine Ventures (Tim De Chant/TechCrunch)
https://techcrunch.com/2026/02/18/dg-matrix-raises-60m-to-make-dat…

Exclusive: DG Matrix raises $60M to make data center power smarter | TechCrunch
The startup is making solid-state transformers capable of intelligently aggregating power from a number of different sources before sending it to data center racks.

Discovering kdotool:

Crosslisted article(s) found for math.CV. https://arxiv.org/list/math.CV/new
[1/1]:
- Perturbation of monic matrix polynomials
Cong Trinh Le, Gue Myung Lee, Yongdo Lim, Tien Son Pham

Sikorsky liefert ersten autonomen „Black Hawk“-Helikopter an U.S. Army
Die Integration eines Fly-by-Wire-Systems und der autonomen Matrix-Software in einen "Black-Hawk"-Helikopter ist geglückt. Der Helikopter kann autonom fliegen.

Some updates on the MISP Galaxy website:
https://www.misp-galaxy.org/mitre-fraud-framework/#
It now includes a matrix-like view of the galaxy for @…

DNS-Eintrag für #Wordpress gäbe. Ich habe so das leichte Gefühl, dass nicht

Compressing Transformer Language Models via Matrix Product Operator Decomposition: A Case Study on PicoGPT
Younes Javanmard, Tanmoy Pandit, Masoud Mardani
https://arxiv.org/abs/2603.28534 https://arxiv.org/pdf/2603.28534 https://arxiv.org/html/2603.28534
arXiv:2603.28534v1 Announce Type: new
Abstract: Transformer-based language models achieve strong performance across NLP tasks, but their quadratic parameter scaling with hidden dimension makes deployment on resource-constrained hardware expensive. We study Matrix Product Operator (MPO) decomposition as a principled compression method for transformers. MPO factorises weight matrices into chains of low-rank cores, with approximation quality controlled by the bond dimension chi. We replace every nn.Linear layer in PicoGPT, a GPT-2-style character-level language model with about 1M parameters, with an MPOLinear module parameterised as an MPO chain. Cores are initialised either by TT-SVD from pretrained dense weights or from random initialisation, and trained using standard PyTorch autograd without a custom backward pass. We derive balanced factorisation schemes for the five distinct weight shapes in PicoGPT and evaluate bond dimensions chi in {4, 8, 16, 32} on Tiny Shakespeare. MPO compression achieves up to 13x compression per transformer block at chi = 4. At chi = 16, the model uses 191,872 parameters instead of 1,020,224 while retaining 97.7% of baseline token accuracy (51.6% vs 52.8%). Reconstruction error follows the expected trend and is lower for three-site than two-site factorisations at the same bond dimension. The chi = 8 model gives the best accuracy per parameter, exceeding the dense baseline by 2.7x on this metric. These results show that MPO parameterisation is a practical and theoretically grounded alternative to low-rank methods and unstructured pruning for transformer compression.
toXiv_bot_toot

RE: https://mastodon.social/@ralchev/116318860294645591
Lol, I thought I used the last mom-and-pop internet provider in the city, but it turns out a lot of other people here access the matrix through them.

Found this interesting rock in the backyard. Kid is really into rocks so we're gonna try to get some better photos and identify/characterize it later.

cintestinalis: Tadpole larva brain (C. intestinalis)
Entire connectivity matrix for the complete brain of a larva of Ciona intestinalis. Each directed edge represents a synaptic connection from pre-synaptic cell i to post-synaptic cell j (may not be a neuron). Edge weights represent the cumulative depth of presynaptic contacts in µm.
This network has 205 nodes and 2903 edges.
Tags: Biological, Connectome, Weighted

Cryptanalysis of a Lightweight RFID Authentication Protocol Based on a Variable Matrix Encryption Algorithm
Hongjun Wu
https://arxiv.org/abs/2603.28313 https://

@fluepke@chaos.social pfändungssicher ist eine familienstiftung.
als implant eher subdermale LED matrix 512x512 (hochauflösende Macintosh classic graphik).

“It was common knowledge that World War V started in a defective twenty-cent Molecular Circuit Matrix in a newly-installed firecontrol computer four miles below Cheyenne Mountain, Wyoming.”
…
Demon
By John Varley

What the heck is wrong with :matrix: #matrix? We're looking for a platform for communication during a larger measurement campaign and from the featureset concluded with either #Mattermost or Matrix (subgroups, archivable, mobile/desktop/web clients, etc.).
But the

Apropos, ich hätte gern langsam mal einen sinnvoll funktionierenden Messenger¹, und bin aktuell fast geneigt, auf IRCv3 zu hoffen…
__
¹Signal ist immerhin ok-ish, Rocketchat ist nicht offen genug und hat andere Probleme, Matrix hat weitere Probleme (inklusive fehlender Multi-Account-Apps), XMPP ging so halbwegs, wenn die Beteiligten sich per Rauchzeichen auf einen Verschlüsselungs­standard einigen konnten, …

We did a few small things to polish #LinuxBoot channel if you're interested! 🥳

Home
LinuxBoot is the concept of using a Linux kernel and initramfs as a bootloader. The linuxboot repository contains a build system implementing LinuxBoot primarily targeting servers and PCs, which started as NERF in January 2017 at Google. Why? Improves boot reliability by replacing lightly-tested firmware drivers with hardened Linux drivers. Improves boot time by removing unnecessary code. Typically makes boot 20 times faster. Allows customization of the initrd runtime to support site-specific…

what matrix communities are you in? I want to use matrix/element more.

Here’s my part in the great nogil/free-threading endeavor: build-and-inspect-python-package now will optionally add 3.14t and 3.15t to the generated matrix if a package indicates to support 3.14 or 3.15!
https://github.com/hynek/build-and-inspect-python-package…

Release v2.16.0 · hynek/build-and-inspect-python-package
Added New include-free-threaded input. When set to 'true', free-threaded Python siblings (for example, 3.14t) are included in the version outputs for Python 3.14 and later, inserted inline after e...

»Matrix messaging gaining ground in government IT:
One-to-one and group messaging, encrypted VoIP calls, video conferencing – the open protocol handles them all«
As I see, @… is used peatically and therefore more popular. When will this become more popular in companies and in general? Any criticism of any state should not prevent this.
💬

Matrix is quietly becoming the chat layer for governments chasing digital sovereignty
FOSDEM 2026: One-to-one and group messaging, encrypted VoIP calls, video conferencing – the open protocol handles them all

Crosslisted article(s) found for math.SG. https://arxiv.org/list/math.SG/new
[1/1]:
- Weak supermajorization between symplectic spectra of positive definite matrix and its pinching
Temjensangba, Hemant Kumar Mishra
https://arxiv.org/abs/2603.27634 https://mastoxiv.page/@arXiv_mathFA_bot/116322760324341903
- Log-concavity from enumerative geometry of planar curve singularities
Tao Su, Baiting Xie, Chenglong Yu
https://arxiv.org/abs/2603.27888 https://mastoxiv.page/@arXiv_mathAG_bot/116323004749425212
- The $\chi_y$-genus, Chern number inequalities and signature
Ping Li, Yibo Ren
https://arxiv.org/abs/2603.27964 https://mastoxiv.page/@arXiv_mathDG_bot/116322841561405646
- The Hodograph Transform Between Thermodynamics and Relativity
Leonid Polterovich
https://arxiv.org/abs/2603.28039 https://mastoxiv.page/@arXiv_grqc_bot/116323121733734684
toXiv_bot_toot

Element | Secure collaboration and messaging
#Matrix #ElementX

Ich finde den Plan mit „Hey Magenta“ eigentlich ganz gut. Das bringt mehr Leute zu Signal und Matrix.
#telekom

Preparing a demo for the @… booth at #CLT. If things goes to plan, you can control different #embedded systems running the same application from your browser.

Nice overview of Matrix in Europe, an open standard for decentralised communications.
https://element.io/blog/digital-sovereignty-is-built-on-an-open-standard-that-enables-federation/

Digital sovereignty is built on an open standard that enables federation
Across Europe, sovereign communications systems are already being deployed, and crucially, they don’t have to exist in isolation.

Anyone have experience setting up #Matrix or another replacement for Discord? How much of a hassle is it?

I don't get the #matrix hate on Fedi. Apparently federation is only desirable as long as the government doesn't use it?

Yesterday I took a closer look at Matrix as a Discord replacement.
I like it. It's more bare bone and less complex to use.
The whiteboard (Neoboard) is better than the Discord one (although you still cannot "lock" an element in place)
My only issue is Webhooks. I use them a lot and for Matrix, it's a bit more complicated.

Are governments properly supporting the digital commons? Many adopt open source software but don't fund the upstream projects that maintain it. This amplifies a "tragedy of the commons" rather than being part of the solution. Governments have historically invented ways to shape the playing field - patents, public universities, copyright, taxes ... They can do it again!

Governments need to adopt Matrix responsibly | Anais Concepcion
Are governments abdicating their duty to the digital commons? And no, this isn't another "pay up" post. The solution is bigger than money. Element astutely highlights a troubling pattern: A government adopts open source software, deploys it, and pays nothing to the editors maintaining the upstream project. Upstream editors, receiving no revenue from their largest users, face a rational but painful choice: build proprietary features that force payment, or shut down. I think it's worse than th…

Uruchomiłem w zeszłym tygodniu n8n, zainstalowałem serwer matrix, żeby łatwo integrować powiadomienia (przecież nie użyje telegrama, szanujmy się) i... Jakoś nie siadł.

Chyba nie lubię klikanych wizualnych środowisk, gdzie opisywanie kodem jest drugoplanowe, a pisanie pluginów wymaga gimnastyki. Do tego podpisanie zewnętrznych workerów, executorów zadań znowu słabo - większość "fajnych" funkcjonalności realnie usprawniających pracę jest za paywallem "enterprice". Jak …

Small list I have put together for alternatives to #discord
I am looking at this from a non-technical perspective...
Willing to hear about other platforms though/
#Matrix = YES = BUT Onboarding is difficult.
#Root

Refining Covariance Matrix Estimation in Stochastic Gradient Descent Through Bias Reduction
Ziyang Wei, Wanrong Zhu, Jingyang Lyu, Wei Biao Wu
https://arxiv.org/abs/2604.21203 h…

Widespread chatbots are perhaps the ultimate expression of the ruling class to prevent the plebs from waking up.
A holodeck for the mind, holding you captive.
A Matrix pod to keep you subdued.

RE: https://furry.engineer/@soatok/116088639302283341
Matrix remains terrible.

Flugdemonstration: Erstes 5-Tonnen-eVTOL transportiert bis zu 1,5 Tonnen Fracht
Die Matrix V5000 ist groß und schwer, kann aber auch, je nach Variante, bis zu zehn Passagiere oder 1,5 Tonnen Fracht aufnehmen.

Weird feeling as while looking to answer to the question "how do I get the coordinates of the minimal value of a numpy.ndarray ?", found that I already asked that question ten years ago: https://laurentperrinet.github.io/sciblog/p…

The Cone of J-Hermitian Matrices and a Geometric Mean
Jose Franco, Allan Merino
https://arxiv.org/abs/2602.21258 https://arxiv.org/pdf/2602.21258 https://arxiv.org/html/2602.21258
arXiv:2602.21258v1 Announce Type: new
Abstract: We study the cone $\mathscr{P}_{\text{J}}$ of positive J-Hermitian matrices associated with an indefinite signature matrix J = $\text{Id}_{p,q}$. We show that the J-exponential map is bijective and use it to analyze the algebraic and geometric structure of $\mathscr{P}_{\text{J}}$. Through a canonical identification with the cone of positive definite matrices, we endow $\mathscr{P}_{\text{J}}$ with a natural Riemannian structure. In this setting, we define a J-geometric mean as the midpoint of geodesics and prove that it is uniquely characterized as the solution of a Riccati-type equation.
toXiv_bot_toot

We’ve just set up a Matrix channel for Vulnerability-Lookup and GCVE discussions.
Matrix public room: #vulnerability-lookup-public:matrix.circl.lu
This space is intended for informal discussions. For standard and more detailed discussions, we recommend using:
🔗 vulnerability-lookup discourse https://

Vulnerability-Lookup
A sharing platform to assist security teams, researchers, and system administrators in identifying and tracking vulnerabilities.

Poll:
What do you prefer for tech related support?
- Group chat, like matrix, xmpp, telegram or similar.
- Forum, like classics internet boards, discourse, reddit, lemmy of similar.
#Poll #Encuesta #FediPoll

⁵ #SocialMediaMatrix hat den Vergleich: https://social-media-matrix.king-consult.de
~ fin ~
4/4

Da ich jetzt wieder Taskwarrior nutze (und auch Timewarrior), habe ich eine Matrix-Gruppe dafür eröffnet.
#GothenburgBitFactory:matrix.org
Bitte gerne teilen.

liebes tagebuch, nicht nur, weil ich gerade ein buch über strichcodes lese, finde ich diese meldung aus der heutigen ausgabe des "i paper" interessant: die britische supermarktkette tesco wird von strich- auf matrix-codes umsteigen!
#QRcodes #urlaub

been getting back into #IRC which is nice. Some old haunts, some new.
The downside to IRC (not that #Matrix etc. are much different) is that when there's a lul in discussion, u can't really tell if everyone is out #touchinggrass

I like matrix, but it's seems like it's really hard to improve and build upon?

Gimlet Labs, which says it is the first "multi-silicon inference cloud" for running AI workloads across diverse types of hardware, raised an $80M Series A (Julie Bort/TechCrunch)
https://techcrunch.com/2026/03/23/star

Startup Gimlet Labs is solving the AI inference bottleneck in a surprisingly elegant way | TechCrunch
Gimlet Labs just raised an $80 million Series A for tech that lets AI run across NVIDIA, AMD, Intel, ARM, Cerebras and d-Matrix chips, simultaneously.

Majority of the people I see recommending moving to Matrix are running on the main home server.
Which is fine, it's the easy path to get started but be aware that roots your identity in that homeserver.
My _personal_ take is that I consider public community chat to be ephemeral, which is why I've never been particularly concerned about using Discord.
Other than encouraging use of a forum for long form & persistent writing that can be discovered / linked over tim…

„Hallo, hier ist der Matrix-Support. Bitte geben Sie ihr SSH-Passwort und/oder ihren SSH-Public-Key sowie ihre IBAN Pin und eine Kopie ihres Personalausweis hier ein, damit Sie weiterhin unseren sicheren Messenger betreiben können.“
Könnte funktionieren.

@… eigentlich warten wir darauf Fluxer selbsthosten zu können. Nachdem das vom eigenen Erfolg überrollt wurde, haben wir Discourse getestet. Matrix kam wegen der userfeindlichen Clients nicht in Frage
RPG-Foren.com haben wir gesehen und lass mich an der Stelle betonen: Wir wollen keine Konkurrenzverstaltung sein! Im Gegenteil setzen wir be…

Die Infoseite zu #Barrierefreiheit.
@…

Crosslisted article(s) found for math.OA. https://arxiv.org/list/math.OA/new
[1/1]:
- On matrix valued (asymmetric) truncated Toeplitz operators
Nihat Gokhan Gogus, Rewayat Khan
https://arxiv.org/abs/2603.23579 https://mastoxiv.page/@arXiv_mathFA_bot/116294346151902644
- Class number zeta function of imaginary quadratic fields
Igor V. Nikolaev
https://arxiv.org/abs/2603.24313 https://mastoxiv.page/@arXiv_mathNT_bot/116294463792701405
- A new source of purely finite matricial fields
David Gao, Srivatsav Kunnawalkam Elayavalli, Aareyan Manzoor, Gregory Patchell
https://arxiv.org/abs/2603.24502 https://mastoxiv.page/@arXiv_mathGR_bot/116294455301063850
toXiv_bot_toot

Regularly, I use the following for near-realtime communications ("text messages”).
- SMS/RCS/iMessage (friends, family)
- Facebook Messenger (friends, family)
- What's App (friends)
- ActivityPub/Mastodon (friends)
- Matrix (friends, work)
- Discord (work)
- Mattermost (friends, locals)
I'm sure I'm missing some.
The fact that no one is allowed to make a single piece of software (for wide distribution) that talks on all of thes…

Well, some of you know that this instance also offers a matrix server.
However, sone users have decided to join every room possible - on every server they can find.
And that causes our server to run out of space and being constantly overloaded all the time.
This is why we cant have nice things

Die EU-Kommission prüft ernsthaft eine Open-Source-Alternative zu Microsoft Teams, basierend auf dem Matrix-Protokoll, um Behördenkommunikation souveräner zu machen statt US-BigTech-Abhängigkeit zu zementieren 👩‍💻🇪🇺. Ein Schritt zur digitalen Selbstbestimmung? Die Debatte geht weiter #Standard −

After a recent *terrible* first attempt at using matrix as communication platform for our rather big measurement campaign in summer, I just tried selfhosting Mattermost, and boy is it a smoother experience. It's as if it was made for team collaboration, funny eh 😅
Also my first time trying out nixos-containers, very nice to encapsulate or group services together independently of your host NixOS.
#Matrix

I'd noticed on apps with Client side decoration that if they blocked on something they were much more of a pain - you can't move the window like you could when they had a window manager driven title bar. This is much more of a pain than not redrawing or responding for a few seconds.
I'm seeing it in Thunderbird's matrix client as it's syncing.

RE: https://beep.town/@zion/116025223395990218
Sometimes I wonder if Matrix Bot is like a horoscope. Is it predicting my future, or am I just reading too much into the messaging?
Either way... It works 🤣

While you're thinking about your contribution to #QGISUC2026, why not hop over and join https://matrix.to/#/#qgisuc:osgeo.org to stay in the loop

@… I stopped using Discord, some time ago.
I continue to use Matrix.

The Sparse Matrix
#SoSoMovies

Do you people think that my VPS with 2GB RAM and 2 CPU cores is enough to run matrix end to end encrypted for me and a few others?
#matrix #selfhosted #selfhosting

On my way to @…. My co-worker Marcus Crestani is already on-site at the @… booth and looking fabulous, will try to do my best to compete.
See you at our booth or my talk tomorrow!

I think I just saw a glitch in the Matrix.
Was on the phone with a customer earlier and they responded to something I said with "you're absolutely right".

Ich denke seit Matrix immer mal wieder an das Zitat "Ignorance is bliss" / "Unwissenheit ist ein Segen".
Ich würde gerne mal ein verwandtes Thema von Euch beleuchten lassen: Inwiefern ist Intelligenz oder mangelnde Intelligenz eigentlich ein Fluch oder ein Segen?
Studien, dass intelligentere Menschen eher zu Depressionen und Suizid neigen, sind ja bekannt.
Also, Umfrage:

General control of linear cellular automata
Franco Bagnoli, Sara Dridi, Bassem Sellami, Amira Mouakher, Samira El Yacoubi
https://arxiv.org/abs/2604.10076 https://arxiv.org/pdf/2604.10076 https://arxiv.org/html/2604.10076
arXiv:2604.10076v1 Announce Type: new
Abstract: In mathematics and engineering, control theory is concerned with the analysis of dynamical systems through the application of suitable control inputs. One of the prominent problems in control theory is controllability which concerns the ability to determine whether there exists a control input that can steer a dynamical system from an initial state to a desired final state within a finite time horizon. There is a general theory for controlling linear or linearizable system, but it cannot be applied to discrete systems like cellular automata, which is the problem of that we address in this paper. We develop a general theory for linear (and affine) cellular automata, and apply it to examples of one-dimensional and two-dimensional Boolean cases. We introduce the concept of controllability matrix and show that controllability holds if and only if the controllability matrix is invertible.
toXiv_bot_toot

Da ich jetzt wieder Taskwarrior nutze (und auch Timewarrior), habe ich eine Matrix-Gruppe dafür eröffnet.
#GothenburgBitFactory:matrix.org
Bitte gerne teilen.

Is Matrix legal? 🫠
https://github.com/element-hq/element-web/issues/33163

app.element.io yields 451 Unavailable For Legal Reasons · Issue #33163 · element-hq/element-web
Steps to reproduce Visit app.element.io. Outcome What did you expect? element-web loading. What happened instead? Additional information I am in the UK. I am aware that this is probably not a bug i...

Jonge meiden kwetsbaar in 'meidenhuizen' op WhatsApp: 'Iedereen kan meekijken' | Tech | NU.nl
#Signal
of
#Matrix met oa #ElementX
via
@…

So what this does: Before a simple ring theoretic check of an equations among determinants succeeds, I somehow have to go through mini-lemmas like
"The 1,1 entry of the matrix [1, v, v; v, 1, f; v, f, 1] is 1." Proof: Just look, it's 1!
I did this for each entry of 4 matrices.
😵‍💫

Crosslisted article(s) found for nlin.PS. https://arxiv.org/list/nlin.PS/new
[1/1]:
- Turing patterns in Matrix-Weighted Networks
Anna Gallo, Wilfried Segnou, Timoteo Carletti
https://arxiv.org/abs/2602.13080 https://mastoxiv.page/@arXiv_condmatstatmech_bot/116079407955524567
toXiv_bot_toot

cintestinalis: Tadpole larva brain (C. intestinalis)
Entire connectivity matrix for the complete brain of a larva of Ciona intestinalis. Each directed edge represents a synaptic connection from pre-synaptic cell i to post-synaptic cell j (may not be a neuron). Edge weights represent the cumulative depth of presynaptic contacts in µm.
This network has 205 nodes and 2903 edges.
Tags: Biological, Connectome, Weighted

When I scroll through my Matrix app, I see the many channels of really cool and prolific projects. It's so beautiful! 🥰

Quantum Graph Theory by Example
Gian Luca Spitzer, Ion Nechita
https://arxiv.org/abs/2603.23651 https://arxiv.org/pdf/2603.23651 https://arxiv.org/html/2603.23651
arXiv:2603.23651v1 Announce Type: new
Abstract: Quantum graphs have been introduced by Duan, Severini, and Winter to describe the zero-error behaviour of quantum channels. Since then, quantum graph theory has become a field of study in its own right. A substantial source of difficulty in working with quantum graphs compared to classical graphs stems from the fact that they are no longer discrete objects. This makes it generally difficult to construct insightful, non-trivial examples. We present a collection of non-trivial quantum graphs that can be thought of in discrete terms, and that can be expressed in the diagrammatic formalism introduced by Musto, Reutter, and Verdon. The examples arise as the quantum graphs acted on by increasingly smaller classical matrix groups, and are parametrised by triples of matrices $(A, B, C)$. The parametrisation reveals a clean decomposition of quantum graph structure into classical and genuinely quantum components: $A$ and $C$ are described by a classical weighted graph called the strange graph, while $B$ provides a purely quantum contribution with no classical analogue. Based on this model, we give exact formulas or establish bounds for quantum graph parameters, such as the number of connected components, the chromatic number, the independence number, and the clique number. Our results provide the first large, parametric families of quantum graphs for which standard graph parameters can be computed analytically.
toXiv_bot_toot

Battery drain on GrapheneOS here the last couple of days has definitely been worse than stock Google Android.
Battery-monitor says Molly is the main culprit.
Apparently Molly, the Signal client, keeps an open connection to the Signal server.
You can't just have the app check every 10 minutes if it has to ring like a phone upon call request. You need actually persistent connection.
On Google's android, google's play-servers do some kind of kung-fu to keep that modem mostly asleep despite this persistence.
Without Play Services, that don't happen.
But, there is a thing in F-Droid called "Sun up".
That does a similar thing I guess? Called "unified push". It uses Mozilla's servers instead of Google's. And does so anonymously apparently, but who knows for sure really? Not me.
End to end encryption means worst you'd be leaking is timing data really.
So install Sun Up from F-Droid and change Molly's settings / notifications / delivery-method to "Unified Push"
We will need a MollyServer too apparently as a bridge from Signal to Unified-Push at Mozilla.
All the cool kids are using molly.adminforge.de - there's the QR code you need at the site there. Maybe molly.notify.dykes.ca or some other one is better? I dunno. Can always use a different one if yours goes away.
We will find out over the next few days if that actually makes any difference to battery consumption.
Might save more if you have lots of other things also using open connections that can use unifed-push too. Emails and Matrix or whatever. Mux all those connections into one.
I don't do those things on my phone though, so it's just Molly, so we'll see.
#grapheneOS #molly #signal

Replaced article(s) found for math.CA. https://arxiv.org/list/math.CA/new
[1/1]:
- On the equivalence between moderate growth-type conditions in the weight matrix setting II
Gerhard Schindl

High-Order Matrix Numerov for Singular Potentials
Nir Barnea
https://arxiv.org/abs/2603.09350 https://arxiv.org/pdf/2603.09350

Replaced article(s) found for cs.DS. https://arxiv.org/list/cs.DS/new
[1/1]:
- Fully Dynamic Adversarially Robust Correlation Clustering in Polylogarithmic Update Time
Vladimir Braverman, Prathamesh Dharangutte, Shreyas Pai, Vihan Shah, Chen Wang
https://arxiv.org/abs/2411.09979 https://mastoxiv.page/@arXiv_csDS_bot/113502653187863544
- A Simple and Combinatorial Approach to Proving Chernoff Bounds and Their Generalizations
William Kuszmaul
https://arxiv.org/abs/2501.03488 https://mastoxiv.page/@arXiv_csDS_bot/113791396712128907
- The Structural Complexity of Matrix-Vector Multiplication
Emile Anand, Jan van den Brand, Rose McCarty
https://arxiv.org/abs/2502.21240 https://mastoxiv.page/@arXiv_csDS_bot/114097340825270885
- Clustering under Constraints: Efficient Parameterized Approximation Schemes
Sujoy Bhore, Ameet Gadekar, Tanmay Inamdar
https://arxiv.org/abs/2504.06980 https://mastoxiv.page/@arXiv_csDS_bot/114312444050875805
- Minimizing Envy and Maximizing Happiness in Graphical House Allocation
Anubhav Dhar, Ashlesha Hota, Palash Dey, Sudeshna Kolay
https://arxiv.org/abs/2505.00296 https://mastoxiv.page/@arXiv_csDS_bot/114437013364446063
- Fast and Simple Densest Subgraph with Predictions
Thai Bui, Luan Nguyen, Hoa T. Vu
https://arxiv.org/abs/2505.12600 https://mastoxiv.page/@arXiv_csDS_bot/114538936921930134
- Compressing Suffix Trees by Path Decompositions
Becker, Cenzato, Gagie, Kim, Koerkamp, Manzini, Prezza
https://arxiv.org/abs/2506.14734 https://mastoxiv.page/@arXiv_csDS_bot/114703384646892523
- Improved sampling algorithms and functional inequalities for non-log-concave distributions
Yuchen He, Zhehan Lei, Jianan Shao, Chihao Zhang
https://arxiv.org/abs/2507.11236 https://mastoxiv.page/@arXiv_csDS_bot/114862112197588124
- Deterministic Lower Bounds for $k$-Edge Connectivity in the Distributed Sketching Model
Peter Robinson, Ming Ming Tan
https://arxiv.org/abs/2507.11257 https://mastoxiv.page/@arXiv_csDS_bot/114862223634372292
- Optimally detecting uniformly-distributed $\ell_2$ heavy hitters in data streams
Santhoshini Velusamy, Huacheng Yu
https://arxiv.org/abs/2509.07286 https://mastoxiv.page/@arXiv_csDS_bot/115178875220889588
- Uncrossed Multiflows and Applications to Disjoint Paths
Chandra Chekuri, Guyslain Naves, Joseph Poremba, F. Bruce Shepherd
https://arxiv.org/abs/2511.00254 https://mastoxiv.page/@arXiv_csDS_bot/115490402963680492
- Dynamic Matroids: Base Packing and Covering
Tijn de Vos, Mara Grilnberger
https://arxiv.org/abs/2511.15460 https://mastoxiv.page/@arXiv_csDS_bot/115580946319285096
- Branch-width of connectivity functions is fixed-parameter tractable
Tuukka Korhonen, Sang-il Oum
https://arxiv.org/abs/2601.04756 https://mastoxiv.page/@arXiv_csDS_bot/115864074799755995
- CoinPress: Practical Private Mean and Covariance Estimation
Sourav Biswas, Yihe Dong, Gautam Kamath, Jonathan Ullman
https://arxiv.org/abs/2006.06618
- The Ideal Membership Problem and Abelian Groups
Andrei A. Bulatov, Akbar Rafiey
https://arxiv.org/abs/2201.05218
- Bridging Classical and Quantum: Group-Theoretic Approach to Quantum Circuit Simulation
Daksh Shami
https://arxiv.org/abs/2407.19575 https://mastoxiv.page/@arXiv_quantph_bot/112874282709517475
- Young domination on Hamming rectangles
Janko Gravner, Matja\v{z} Krnc, Martin Milani\v{c}, Jean-Florent Raymond
https://arxiv.org/abs/2501.03788 https://mastoxiv.page/@arXiv_mathCO_bot/113791421814248215
- On the Space Complexity of Online Convolution
Joel Daniel Andersson, Amir Yehudayoff
https://arxiv.org/abs/2505.00181 https://mastoxiv.page/@arXiv_csCC_bot/114437005955255553
- Universal Solvability for Robot Motion Planning on Graphs
Anubhav Dhar, Pranav Nyati, Tanishq Prasad, Ashlesha Hota, Sudeshna Kolay
https://arxiv.org/abs/2506.18755 https://mastoxiv.page/@arXiv_csCC_bot/114737342714568702
- Colorful Minors
Evangelos Protopapas, Dimitrios M. Thilikos, Sebastian Wiederrecht
https://arxiv.org/abs/2507.10467
- Learning fermionic linear optics with Heisenberg scaling and physical operations
Aria Christensen, Andrew Zhao
https://arxiv.org/abs/2602.05058
toXiv_bot_toot

@… I host a private Matrix server on Synapse, and have to manage the room administration very manually (role account to act as room admins). I think Continuwity might help, but… switching sounds hard (and I'll lose people, or at the very least disrupt connections/flows).
Might have to just bankrupt my existing setup, one day, and hope for the best, but really n…

Replaced article(s) found for math.OA. https://arxiv.org/list/math.OA/new
[1/1]:
- Invariant $C^*$-subalgebras of the reduced group $C^*$-algebra
Tattwamasi Amrutam, Yongle Jiang
https://arxiv.org/abs/2503.09548 https://mastoxiv.page/@arXiv_mathOA_bot/114153932488469168
- Uniqueness of the zeta transformation in operator K-theory
Mikkel Munkholm
https://arxiv.org/abs/2512.16035 https://mastoxiv.page/@arXiv_mathOA_bot/115745354413545840
- Kernel Radon-Nikodym Derivatives for Random Matrix Products
James Tian
https://arxiv.org/abs/2509.20496 https://mastoxiv.page/@arXiv_mathFA_bot/115269543643186260
toXiv_bot_toot

Huh.
Not every day Apple releases a new line of hardware. Let alone a cheaper one.
Wonder if Keanu will do an ad spot for them. 😹
#apple #macbookneo #laptop #matrix

cintestinalis: Tadpole larva brain (C. intestinalis)
Entire connectivity matrix for the complete brain of a larva of Ciona intestinalis. Each directed edge represents a synaptic connection from pre-synaptic cell i to post-synaptic cell j (may not be a neuron). Edge weights represent the cumulative depth of presynaptic contacts in µm.
This network has 205 nodes and 2903 edges.
Tags: Biological, Connectome, Weighted

#SilentSunday #silhouettes #lights #throwback

cintestinalis: Tadpole larva brain (C. intestinalis)
Entire connectivity matrix for the complete brain of a larva of Ciona intestinalis. Each directed edge represents a synaptic connection from pre-synaptic cell i to post-synaptic cell j (may not be a neuron). Edge weights represent the cumulative depth of presynaptic contacts in µm.
This network has 205 nodes and 2903 edges.
Tags: Biological, Connectome, Weighted

Crosslisted article(s) found for math.OA. https://arxiv.org/list/math.OA/new
[1/1]:
- Time-Scaled Intertwining Cocycles and Identifiability of Multi-Semigroup Mixtures on Hilbert Oper...
Anton Alexa
https://arxiv.org/abs/2603.20322 https://mastoxiv.page/@arXiv_mathFA_bot/116283090397448396
- Universal Coefficients and Mayer-Vietoris for Moore Homology of Ample Groupoids
Luciano Melodia
https://arxiv.org/abs/2603.20861 https://mastoxiv.page/@arXiv_mathAT_bot/116283018602632921
- Cocycles and positive functionals in higher cohomology
Antonio L\'opez Neumann, Piotr W. Nowak
https://arxiv.org/abs/2603.21431 https://mastoxiv.page/@arXiv_mathAT_bot/116283163474031677
- Maximality Levels of the classical permutation group in the quantum permutation group
J. P. McCarthy
https://arxiv.org/abs/2603.21759 https://mastoxiv.page/@arXiv_mathQA_bot/116283160850717727
- Triangular Decomposition of the Crystal Lattice of Quantized Function Algebras: Revisited
Ayan Dey
https://arxiv.org/abs/2603.21868 https://mastoxiv.page/@arXiv_mathQA_bot/116283166064403090
- Cyclicity of stable matrix free polynomials over non-commutative operator unit balls
Jeet Sampat, Maximilian Tornes
https://arxiv.org/abs/2603.22129 https://mastoxiv.page/@arXiv_mathFA_bot/116283334169858979
toXiv_bot_toot

How does XMPP work? I'm looking at Jabber's website and apparently some clients are both clients and servers at the same time or something? It's quite confusing...
Are spaces or multi-channel groups (like discord) a thing in xmpp? Which clients support that on iOS and Linux and etc?
Is Movim a client or a server or what?
Are groups hosted in the server of the user who created it like on Matrix or what?
Any easy tutorials I could send to my discord friends?
#XMPP #Jabber #Movim

Telefónica-#Umfrage: Verbraucher wollen ein digital eigenständigeres 🇪🇺 #Europa – Mehr als zwei Drittel bevorzugen digitale Dienste von europäischen Unternehmen¹
Aus unserer Sicht liegt das an höherem Vertrauen Dank hohen #Datenschutz-Standards, Kundennähe, Rechtssicherheit und besserer Kontrolle über eigene Daten.
➡️ Diese Stärken müssen ausgebaut werden. Im Bereich #SocialMedia heißt das: digital souveräne Lösungen voran bringen!
👉 #DiDay

I see no sign of any recognition from those who would want such a ban that they see any of the collateral damage a successful ban would have on the majority of kids who are not falling for this bullshit. That they are banning any good at all along with the bad.
Under 18s only
I see that the lobbying for these laws are funded by the absolute worst companies on the internet, those who will be entrenched by the legal compliance costs, that will cement themselves as the arbitrators of who is allowed to access the internet.
It’s a gift to Palantir and other surveillance companies. The very people running these algo-feeds are the ones who benefit from IDing every user and stalking them across the internet on their government-approved internet-licence IDs.
I don’t think even a successful ban on social media for kids would actually address the issue of kids being exposed to sexism and misogony or reduce the kids alienation and depression.
A ban can’t help, will make many things worse, won’t address the problem, and will make competing with the worst surveillance capitalists on the planet more difficult.
Going to war with every internet site and advice forum and making internet access harder won’t fix anything, and will have massive collateral damage against everyone seeking support from strangers or trying to learn things their parents won’t teach them.
But I see we are going to do it anyway.
The direction is clear.
Those companies do get what they lobby for, and they are lobbying hard for ID checks on every website, wrapping their desire to enclose the internet commons for themselves in a faux concern for children’s welfare.
And governments wish to monitor and control the internet, so they will pass these laws.
I wonder how many parents have a family group-chat that they’re going to accidentally ban their kids from using, not realizing that ‘social media’ might include Whatsapp? 😆
It won’t fix anything, it will make the situation for kids worse, impose costs and rents and hacks and exploits on all of us, and increase government and corporate power.
Many will lose access to their networks of support and help.
So it goes.
We will build a better more censorship resistant internet. It’s already here really: Briar. Matrix. Nostr. Bitchat. Veilid. Spritely. And the rest.
The laws may push us there faster.
The race will go on.

RE: #JournalistInnen!
Das Deutsche Technikmuseum ⚙️ (folgen!) veröffentlicht jetzt #Pressemitteilungen frei zugänglich im #Fediverse via #Mastodon.
Das ist vorbildlich, denn @… ist als einziges #SocialMedia als öffentliches digitales Gut anerkannt. Mehr siehe unsere #SocialMediaMatrix:
➡️ #Medien #Journalismus #Presse #Nachrichten #DutGemacht #DiDay #WissKomm #SciComm #Wissenschaft #Bildung #Berlin