Tootfinder

This https://arxiv.org/abs/2505.12364 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

On a Riemann-Roch formula for stacks with finite cyclotomic inertia
B. Toen defined a Riemann-Roch map from the rational algebraic K-theory of a tame Deligne-Mumford quotient stack to the étale K-theory of its inertia. He proved that this map is an isomorphism and that it is covariant with respect to proper maps. Moreover G. Vezzosi and A. Vistoli proved a decomposition theorem for the equivariant K-theory of a noetherian scheme. In this paper we give a geometric definition of the Vezzosi-Vistoli decomposition, interpreting the pieces as corresponding to the c…

Der August bringt wichtige Veränderungen für viele von euch! 📅
Zum Artikel: https://heise.de/-10501158?wt_mc=sm.red.ho.mastodon.mastodon.md_beitraege.md_beitraege&utm_source=mastodon

i'm finna hike up to the used record store and see if i can sell some records
Machine-generated ALT: three photos showcase a collection of 12 diverse vinyl records, spanning genres such as rock, soul, jazz, Christmas music, and contemporary pop, featuring artists like Lucinda Williams, Frank Sinatra, Chick Corea, Ramsey Lewis, Lana Del Rey, Mavis Staples, and Hugh Masekela.

Microsoft is pushing for bulk email senders to use addresses that can be replied to. (ie not "no-reply@")

Strengthening Email Ecosystem: Outlook’s New Requirements for High‐Volume Senders | Microsoft Community Hub
April 29th Update - Changes have been made to the action take on messages that do not meet requirements, please see details below. Introduction In an era...

This https://arxiv.org/abs/2406.11975 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_qbi…

Fast uncovering of protein sequence diversity from structure
We present InvMSAFold, an inverse folding method for generating protein sequences that is optimized for diversity and speed. For a given structure, InvMSAFold generates the parameters of a probability distribution over the space of sequences with pairwise interactions, capturing the amino acid covariances observed in Multiple Sequence Alignments (MSA) of homologous proteins. This allows for the efficient generation of highly diverse protein sequences while preserving structural and functional i…

Baby's first unun!
My #AmateurRadio journey continues with making some of my own equipment...
I wanted to be able to connect either an EFHW or an EFRW to my KX3, but move the actual antenna away from the radio, so that I can POTA with other people close enough to talk, while keeping the antennas for the different out of each others' near field so they don't interere. To …

Calamus 40 That shadow, my likeness
An odd little poem to find in Calamus. I like it, I connect to the existential doubt.
How often I question and doubt whether that is really me
The self Whitman is unsure of is the quotidian self, the one that works and talks and shops. What does he embrace as the real him?
among my lovers, and carolling my songs, I never doubt whether that is really me.
There's our lusty Whitman, finding his true self in his lovers and his poetry.
PS: this poem introduced me to the lovely word chaffer.

Spectral Geometry with Exceptional Symmetry and Charged Higgs Fields
Shane Farnsworth
https://arxiv.org/abs/2506.21496 https://arxiv.…

Spectral Geometry with Exceptional Symmetry and Charged Higgs Fields
We lay the foundations for a general approach to nonassociative spectral geometry as an extension of Connes' noncommutative geometry by explaining how to construct finite-dimensional, discrete spectral geometries with exceptional symmetry, and gauge covariant Dirac operators. We showcase an explicit construction of a geometry corresponding to the internal space of a $G_2\times G_2$ gauge theory with charged scalar content and scalar representations restricted by novel conditions arising from th…

Time and covariance smoothing for restoration of bivariate signals
Yusuf Yigit Pilavci (CRIStAL), Pierre Palud (LERMA), Julien Flamant (CRAN), Pierre-Antoine Thouvenin (CRIStAL), J\'er\'emie Boulanger (CRIStAL), Pierre Chainais (CRIStAL)
https://arxiv.org/abs/2506.20237

Time and covariance smoothing for restoration of bivariate signals
In many applications and physical phenomena, bivariate signals are polarized, i.e. they trace an elliptical trajectory over time when viewed in the 2D planes of their two components. The smooth evolution of this elliptical trajectory, called polarization ellipse, is highly informative to solve ill-posed inverse problems involving bivariate signals where the signal is collected through indirect, noisy or incomplete measurements. This work proposes a novel formulation and an efficient algorithm f…

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