Tootfinder

'Tied to a motorcycle and dragged' — Russia likely executed another Ukrainian POW, ombudsman says: https://benborges.xyz/2025/07/02/tied-to-a-motorcycle-and.html

Die Verwaltung entdeckt Matrix – nicht den Film, das Prototkoll. Esther Menhard berichtet: Statt weiter im OSCI-Altbau zu wohnen, zieht man ins offene Loft. Zwischen 900 Anforderungen und föderalem Klein-Klein droht auch dieser Digitalisierungsversuch im deutschen Verwaltungslabyrinth zu versanden. Digitalisierung, Reloaded!
#Verwaltungsdigitalisierung

Verwaltungsdigitalisierung: Arbeitsgruppe empfiehlt Matrix-Protokoll für Behördenkommunikation
Online-Kommunikation mit Behörden ist für Bürger*innen und Unternehmen kompliziert, für Verwaltungen oft teuer und aufwendig. Das soll sich ändern: Eine Arbeitsgruppe von IT-Architekten aus Bund und Ländern schlägt vor, wie alle von einer gemeinsamen Infrastruktur profitieren, und empfehlen das offene Kommunikationsprotokoll Matrix.

Numerical Techniques for the Maximum Likelihood Toeplitz Covariance Matrix Estimation: Part I. Symmetric Toeplitz Matrices
Yuri Abramovich, Victor Abramovich, Tanit Pongsiri
https://arxiv.org/abs/2507.01230

Numerical Techniques for the Maximum Likelihood Toeplitz Covariance Matrix Estimation: Part I. Symmetric Toeplitz Matrices
In several applications, one must estimate a real-valued (symmetric) Toeplitz covariance matrix, typically shifted by the conjugated diagonal matrices of phase progression and phase "calibration" errors. Unlike the Hermitian Toeplitz covariance matrices, these symmetric matrices have a unique potential capability of being estimated regardless of these beam-steering phase progression and/or phase "calibration" errors. This unique capability is the primary motivation of this paper.

Digitalminister wirbt für Glasfaser
Videokonferenzen, Datenpakete blitzschnell versenden – flächendeckende Glasfaser soll den Datenfluss beschleunigen. Der Digitalminister setzt auf Mitwirkung.
https://www.

JD Vance on Republican megabill: ICE funding matters, 'everything else' is 'immaterial' (Steve Benen/MSNBC)
https://www.msnbc.com/rachel-maddow-show/maddowblog/jd-vance-republican-megabill-ice-funding-matters-everything-else-immat-rcna216181
http://www.memeorandum.com/250701/p38#a250701p38

Canadians, please confirm this is valid
EDIT: Added in better alt text

Regionalized Metric Framework: A Novel Approach for Evaluating Multimodal Multi-Objective Optimization Algorithms
Jintai Chen, Fangqing Liu, Xueming Yan, Han Huang
https://arxiv.org/abs/2506.00468

Regionalized Metric Framework: A Novel Approach for Evaluating Multimodal Multi-Objective Optimization Algorithms
This study aims to optimize the evaluation metric of multimodal multi-objective optimization problems using a Regionalized Metric Framework, which provides a certain boost to research in this field. Existing evaluation metrics usually use the reference set as the evaluation basis, which inevitably leads to reference set dependence. To optimize this problem, this study proposes an evaluation metric based on a Regionalized Metric Framework. The algorithm divides the set of solutions to be evaluat…

This https://arxiv.org/abs/2401.16619 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_qu…

Quantum algorithms for calculating determinant and inverse of matrix and solving linear algebraic systems
We propose quantum algorithms, purely quantum in nature, for calculating the determinant and inverse of an $(N-1)\times (N-1)$ matrix (depth is $O(N^2\log N)$) which is a simple modification of the algorithm for calculating the determinant of an $N\times N$ matrix (depth is $O(N\log^2 N)$. The basic idea is to encode each row of the matrix into a pure state of some quantum system. In addition, we use the representation of the elements of the inverse matrix in terms of algebraic complements. Thi…

Constructing Two Metrics for Spencer Cohomology: Hodge Decomposition of Constrained Bundles
Dongzhe Zheng
https://arxiv.org/abs/2506.00752 https://

Constructing Two Metrics for Spencer Cohomology: Hodge Decomposition of Constrained Bundles
This paper establishes a metric framework for Spencer complexes based on the geometric theory of compatible pairs $(D,λ)$ in principal bundle constraint systems, solving fundamental technical problems in computing Spencer cohomology of constraint systems. We develop two complementary and geometrically natural metric schemes: a tensor metric based on constraint strength weighting and an induced metric arising from principal bundle curvature geometry, both maintaining deep compatibility with the…

Currently working on implementing Matrix's new 'Matrix Authentication Service' for our NZ-based instance... non-trivial. But it's such an impressive system (it's doing far more than competitors like Salesforce Slack and Microsoft Teams).