Tootfinder

This https://arxiv.org/abs/2406.14346 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

Atomic Toposes with Co-Well-Founded Categories of Atoms
The atoms of the Schanuel topos can be described as the pairs $(n,G)$ where $n$ is a finite set and $G$ is a subgroup of $\operatorname{Aut}(n)$. We give a general criterion on an atomic site ensuring that the atoms of the topos of sheaves on that site can be described in a similar fashion. We deduce that these toposes are locally finitely presentable. By applying this to the Malitz-Gregory atomic topos, we obtain a counter-example to the conjecture that every locally finitely presentable topos…

A systematic study of hot O production and escape from Martian atmosphere in response to enhanced EUV Irradiance from Solar Flares
Chirag Rathi, Dimitra Atri, Dattaraj B. Dhuri
https://arxiv.org/abs/2506.20337

A systematic study of hot O production and escape from Martian atmosphere in response to enhanced EUV Irradiance from Solar Flares
The study of the evolution of Martian atmosphere and its response to EUV irradiation is an extremely important topic in planetary science. One of the dominant effects of atmospheric losses is the photochemical escape of atomic oxygen from Mars. Increasing the magnitude of the irradiation changes the response of the atmosphere. The purpose of the current paper is to analyze the effects of enhanced EUV irradiation on the escape rates of oxygen atoms. We have used the solar flare of 2017 September…

WhatsApp launches optional Meta AI-generated summaries of unread messages in the US; Meta can't read the messages and summaries are hidden from other chat users (Ivan Mehta/TechCrunch)
https://techcrunch.com/2025/06/25/meta-is-adding-ai-power…

Meta is adding AI-powered summaries to WhatsApp | TechCrunch
Meta announced on Wednesday that it's adding an AI-powered summaries feature to WhatsApp. The optional new feature uses Meta AI to summarize unread

Mayor Adams hired campaign consultant accused of strangling girlfriend in SoHo hotel (Clayton Guse/Gothamist)
https://gothamist.com/news/mayor-adams-hired-campaign-consultant-accused-of-strangling-girlfriend-in-soho-hotel
http://www.memeorandum.com/250626/p79#a250626p79

💍 Some plants make their own pesticide—but at what cost to the atmosphere?
#plants

Some plants make their own pesticide—but at what cost to the atmosphere?
A natural alternative to pesticides may be hiding in a misunderstood plant compound—but it could come at an environmental cost.

Audience Optimization - 4 Ways to Increase Streaming Royalties
#MusicianTips #UnsignedMusician

Audience Optimization - 4 Ways to Increase Streaming Royalties
Stan Stewart - @muz4now

A digital twin of atomic ensemble quantum memories
Elizabeth Robertson, Benjamin Maa{\ss}, Konrad Tschernig, Janik Wolters
https://arxiv.org/abs/2506.20403

A digital twin of atomic ensemble quantum memories
Accurate performance estimation of experimentally demonstrated quantum memories is key to understand the nuances in their deployment in photonic quantum networks. While several software packages allow for accessible quantum simulation, they often do not account for the loss and noise in physical devices. We present a framework for modeling ensemble-based atomic quantum memories using the quantum channel formalism. We provide a Kraus matrix representation of several experimentally implemented st…

Efficient Band Structure Unfolding with Atomic-centered Orbitals: General Theory and Application
Jingkai Quan, Nikita Rybin, Matthias Scheffler, Christian Carbogno
https://arxiv.org/abs/2506.21089

Efficient Band Structure Unfolding with Atomic-centered Orbitals: General Theory and Application
Band structure unfolding is a key technique for analyzing and simplifying the electronic band structure of large, internally distorted supercells that break the primitive cell's translational symmetry. In this work, we present an efficient band unfolding method for atomic orbital (AO) basis sets that explicitly accounts for both the non-orthogonality of atomic orbitals and their atom-centered nature. Unlike existing approaches that typically rely on a plane-wave representation of the (semi-)val…

Billionaire and radio host John Catsimatidis prefers Eric Adams over fellow Republican in mayor's race (Emily Ngo/Politico)
https://www.politico.com/news/2025/06/27/billionaire-and-radio-host-john-catsimatidis-prefers-eric-adams-over-fellow-republican-in-mayors-race-00429886
http://www.memeorandum.com/250627/p163#a250627p163