Tootfinder

Fundamental limits of distributed covariance matrix estimation via a conditional strong data processing inequality
Mohammad Reza Rahmani, Mohammad Hossein Yassaee, Mohammad Reza Aref
https://arxiv.org/abs/2507.16953

Fundamental limits of distributed covariance matrix estimation via a conditional strong data processing inequality
Estimating high-dimensional covariance matrices is a key task across many fields. This paper explores the theoretical limits of distributed covariance estimation in a feature-split setting, where communication between agents is constrained. Specifically, we study a scenario in which multiple agents each observe different components of i.i.d. samples drawn from a sub-Gaussian random vector. A central server seeks to estimate the complete covariance matrix using a limited number of bits communica…

LightCom: A Generative AI-Augmented Framework for QoE-Oriented Communications
Chunmei Xu, Siqi Zhang, Yi Ma, Rahim Tafazolli
https://arxiv.org/abs/2507.17352 https://

LightCom: A Generative AI-Augmented Framework for QoE-Oriented Communications
Data-intensive and immersive applications, such as virtual reality, impose stringent quality of experience (QoE) requirements that challenge traditional quality of service (QoS)-driven communication systems. This paper presents LightCom, a lightweight encoding and generative AI (GenAI)-augmented decoding framework, designed for QoE-oriented communications under low signal-to-noise ratio (SNR) conditions. LightCom simplifies transmitter design by applying basic low-pass filtering for source codi…

Adding back $8.5 million starter changes everything about Cowboys positional depth https://cowboyswire.usatoday.com/story/sports/nfl/cowboys/2025/08/24/trevon-diggs-return-dallas-cowboys-weakness-strength-2…

Generalized $u$-Gibbs measures for $C^\infty$ diffeomorphisms
Snir Ben Ovadia, David Burguet
https://arxiv.org/abs/2506.18238 https://

Generalized $u$-Gibbs measures for $C^\infty$ diffeomorphisms
We show that for every $C^\infty$ diffeomorphism of a closed Riemannian manifold, if there exists a positive volume set of points which admit some expansion with a positive Lyapunov exponent (in a weak sense) then there exists an invariant probability measure with a disintegration by absolutely continuous conditionals on smoothly embedded disks subordinated to unstable leaves. As an application, we prove a strong version of Viana conjecture in any dimension, generalizing a recent result of the …

Flash floods in the Alps: How climate change is supercharging summer storms #alps

Flash floods in the Alps: How climate change is supercharging summer storms
Fierce, fast summer rainstorms are on the rise in the Alps, and a 2 C temperature increase could double their frequency. A new study from researchers at the University of Lausanne and the University of Padova used data from nearly 300 Alpine weather stations to model this unsettling future.

Superconductivity on the edge of vanishing magnetic order
Zhiqiang Wang, Ke Wang, K. Levin
https://arxiv.org/abs/2506.18996 https://a…

Superconductivity on the edge of vanishing magnetic order
There should be no question that magnetism and superconductivity appear in close proximity in many if not most of the unconventional superconductors. These two phases are importantly correlated: the strongest manifestations of this superconducting pairing are generally associated with the weakest magnetism. It is often stated that this behavior results from a quantum critical point (QCP), although not all such superconductors fit into this category. In this paper we consider a second scenario f…

Die Löffel.
https://www.rbb24.de/politik/beitrag/2025/07/berlin-sommer-interview-weidel-zps-protest-stoerung-verfahren-polizei.html

Am Donnerstag21.08. starb der Dichter Eugen Gomringer im Alter von 100 Jahren in seiner Wahlheimat Bamberg.
https://www.br.de/nachrichten/kultur/freiheit-und-strenge-dichter-eugen-gomringer-gestorben,SvQb4RO

"Freiheit und Strenge": Dichter Eugen Gomringer gestorben
Der Begründer der Konkreten Poesie löste 2017 mit einem Gedicht an einer Hausfassade viel Wirbel aus. Eugen Gomringer galt als einer der wichtigsten Wegbereiter der Moderne in der Nachkriegsdichtung. Nun ist der Dichter gestorben.

More summer weather extremes in Europe likely as North Atlantic Oscillation intensifies under climate change https://phys.org/news/2025-06-summer-weather-extremes-europe-north.html

More summer weather extremes in Europe likely as North Atlantic Oscillation intensifies under climate change
Due to global warming, the North Atlantic Oscillation, an atmospheric circulation pattern that strongly influences European weather, is becoming more extreme in the summer, according to a study published in Communications Earth & Environment.