Tootfinder

This https://arxiv.org/abs/2503.20759 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

Surface Subgroups for Cocompact Lattices of Isometries of $H^{2n}$
We prove the existence of surface subgroups within any cocompact lattice $Γ$ in $\mathrm{SO}(2n,1)$ for $n\geq2$. This result addresses the cases missing from the work of Hamenstädt in 2015, who constructed surface subgroups in cocompact lattices for all other rank-one semisimple Lie groups of non-compact type.

Remarkable.
I visited Budapest not too long ago and ••loved•• the place. I had trouble while there parsing or even perceiving all the layers of Orbanism and cosmopolitanism and Hungarian-ness. I could tell that there were strong undercurrents invisible to me, both oppressive and liberatory. And I had a sense that yes, it was a city where a march like this was just beneath the surface everywhere, every day.
Watch a few seconds the video for a sense of scale.
https://www.theguardian.com/world/live/2025/jun/28/europe-latest-news-budapest-pride-march-hungary-orban-ukraine-russia-updates

A Fox-Neuwirth Basis for the Sinha Spectral Sequence
Andrea Marino
https://arxiv.org/abs/2505.22958 https://arxiv.org/pdf/2505.22958

A Fox-Neuwirth Basis for the Sinha Spectral Sequence
Recently, Sinha defined a spectral sequence approximating the (co)homology of the space of long knots in R^m modulo immersions, stemming from a cosimplicial structure on the compactified configuration spaces à la Kontsevich. We provide an equivalent cosimplicial structure on (the barycentric subdivision of) a regular CW complex with cells indexed by Fox-Neuwirth trees. As a corollary, we give a combinatorial presentation of the Sinha Spectral Sequence in terms of Fox-Neuwirth trees for all dim…

This https://arxiv.org/abs/2411.16261 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

Almost-Fuchsian representations in PU(2,1)
In this paper, we study nonmaximal representations of surface groups in PU(2,1). In genus large enough, we show the existence of convex-cocompact representations of non-maximal Toledo invariant admitting a unique equivariant minimal surface, which is holomorphic and almost totally geodesic. These examples can be obtained for any Toledo invariant of the form 2-2g +2/3 d, provided g is large compared to d. When d is not divisible by 3, this yields examples of convex-cocompact representations in P…

The CosmoVerse White Paper - Addressing observational tensions in cosmology with systematics and fundamental physics: #HubbleTension debate: https://physicsworld.com/a/cosmic-conflict-continues-new-data-fuel-the-hubble-tension-debate/. Also A Tale of Many H0: https://www.annualreviews.org/content/journals/10.1146/annurev-astro-052622-033813

Unconventional magnon transport in antiferromagnet NiPS$_3$ induced by an anisotropic spin-flop transition
Peisen Yuan, Beatriz Mart\'in-Garc\'ia, Evgeny Modin, M. Xochitl Aguilar-Pujol, F\`elix Casanova, Luis E. Hueso
https://arxiv.org/abs/2505.23482

Unconventional magnon transport in antiferromagnet NiPS$_3$ induced by an anisotropic spin-flop transition
Nonlocal magnon transport can provide valuable insight into the magnetic properties of magnetic insulators (MIs). A spin-flop transition, a typical magnetic reorientation in antiferromagnets, is expected to affect mag non transport, but studies on this topic are still rare and remain challenging, especially for van der Waals materials. Here we demonstrate the unconventional magnon transport driven by an anisotropic spin-flop transition in the van der Waals antiferromagnet NiPS$_3$. Examining th…

🇺🇦 #NowPlaying on KEXP's #VarietyMix
Casino Versus Japan:
🎵 Come Along, Do
#CasinoVersusJapan
https://casinoversusjapan.bandcamp.com/track/come-along-do
https://open.spotify.com/track/5HIhTwd4cNFHLUNZe9oxDU

Cucumber… or… a dragon! #photography

Cucumber rolls are known as kappamaki. But official anime subtitles can never have translator's notes I guess, so instead the audience is just left with a nonsensical line.

But you should stay on Twitter, so as not to be in an echo chamber!
🙄
https://bsky.app/profile/cascoinfoundation.org/post/3lr6rqsknvs23