Tootfinder

Observation of superconductivity-induced leading-edge gap in Sr-doped $\mathrm{La}_{3}\mathrm{Ni}_{2}\mathrm{O}_{7}$ thin films
Wenjie Sun, Zhicheng Jiang, Bo Hao, Shengjun Yan, Hongyi Zhang, Maosen Wang, Yang Yang, Haoying Sun, Zhengtai Liu, Dianxiang Ji, Zhengbin Gu, Jian Zhou, Dawei Shen, Donglai Feng, Yuefeng Nie
https://arx…

Observation of superconductivity-induced leading-edge gap in Sr-doped $\mathrm{La}_{3}\mathrm{Ni}_{2}\mathrm{O}_{7}$ thin films
The discovery of high-temperature superconductivity in pressurized bulk $\mathrm{La}_{3}\mathrm{Ni}_{2}\mathrm{O}_{7}$ has ignited significant interest in nickelate superconductors. Unlike cuprates, where superconductivity predominantly originates from the $\mathrm{3}d_{x^2-y^2}$ orbital, nickelates exhibit additional complexities involving contributions from the $\mathrm{3}d_{z^2}$ orbital, prompting fundamental questions about their pairing mechanisms. Despite recent progress in stabilizing s…

Telemedizin: Patientenversorgung braucht einfach zugängliche Kommunikationswege
Die Deutsche Gesellschaft für Telemedizin fordert mehr digitale Vernetzung und Telemonitoring für eine lückenlose und moderne Patientenversorgung.

Who is realistically going to carry around a second digital camera with them? Of course cameras are better than smartphones, but the best camera is the one you have with you at the moment.
I've taken thousands of photos that I never would have thanks to my iphone.
https://

The unitary group of a $\mathrm{II}_1$ factor is SOT-contractible
David Jekel
https://arxiv.org/abs/2508.05834 https://arxiv.org/pdf/2508.05834

The unitary group of a $\mathrm{II}_1$ factor is SOT-contractible
We show that the unitary group of any SOT-separable $\mathrm{II}_1$ factor $M$, with the strong operator topology, is contractible. Combined with several old results, this implies that the same is true for any SOT-separable von Neumann algebra with no type $\mathrm{I}_n$ direct summands ($n < \infty$). The proof for the $\mathrm{II}_1$-factor case uses regularization via free convolution and Popa's theorem on the existence of approximately free Haar unitaries in $\mathrm{II}_1$ factors.

Here's a great modern version of the classic "Join or Die" cartoon from the American Revolution to prepare for Friday.
#NoKings #uspol

Bannon warns GOP could lose 40 House seats over Epstein files (Ashleigh Fields/The Hill)
https://thehill.com/homenews/house/5398104-steve-bannon-donald-trump-epstein-files-2026-midterms/
http://www.memeorandum.com/250712/p28#a250712p28

Quadratic forms of signature $(2, 2)$ or $(3, 1)$ I: effective equidistribution in quotients of $\mathrm{SL}_4(\mathbb{R})$
Zuo Lin
https://arxiv.org/abs/2508.06705 https://

Quadratic forms of signature $(2, 2)$ or $(3, 1)$ I: effective equidistribution in quotients of $\mathrm{SL}_4(\mathbb{R})$
We prove an effective equidistribution theorem for orbits of horospherical subgroups of $\mathrm{SO}(2, 2)$ and $\mathrm{SO}(3, 1)$ in quotients of $\mathrm{SL}_4(\mathbb{R})$ with a polynomial error term. In a forthcoming paper, we will use this theorem to prove an effective version of the Oppenheim conjecture for indefinite quadratic forms of signature $(2, 2)$ or $(3, 1)$ with a polynomial error rate.

Flagifying the Dowker Complex
Marius Huber, Patrick Schnider
https://arxiv.org/abs/2508.08025 https://arxiv.org/pdf/2508.08025

Flagifying the Dowker Complex
The Dowker complex $\mathrm{D}_{R}(X,Y)$ is a simplicial complex capturing the topological interplay between two finite sets $X$ and $Y$ under some relation $R\subseteq X\times Y$. While its definition is asymmetric, the famous Dowker duality states that $\mathrm{D}_{R}(X,Y)$ and $\mathrm{D}_{R}(Y,X)$ have homotopy equivalent geometric realizations. We introduce the Dowker-Rips complex $\mathrm{DR}_{R}(X,Y)$, defined as the flagification of the Dowker complex or, equivalently, as the maximal si…

CFP "Satan the Seductor: Willful and Unwitting Damnation in Early Modern Europe" https://networks.h-net.org/group/announcements/20070199/cfp-satan-seductor-willful-and-unwitting-damnation-early-modern-europe…

Neue Sicherheitslücken in verschiedenen modernen Ryzen und Epyc Prozessoren AMDs
Die als mittelmäßig gefährlich eingestuften Schwächen wurden von Microsoft erkannt und bislang wohl nicht angegriffen. Einen Linux-Patch gibt es bereits.