Results 41 to 50 of about 17,059 (136)
Commutators and Anti-Commutators of Idempotents in Rings
, 2018 We show that a ring $\,R\,$ has two idempotents $\,e,e'\,$ with an invertible commutator $\,ee'-e'e\,$ if and only if $\,R \cong {\mathbb M}_2(S)\,$ for a ring $\,S\,$ in which $\,1\,$ is a sum of two units. In this case, the "anti-commutator" $\,ee'+e'e\
Khurana, Dinesh, Lam, T. Y.
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A Voronoi Diagram‐Based Approach for AC Optimal Power Flow
IET Generation, Transmission &Distribution, Volume 20, Issue 1, January/December 2026.This paper presents a new approach for AC optimal power flow. The proposed approach begins by constructing a Voronoi diagram using a set of initial sample points that represent candidate solutions distributed across the search space. It then iteratively adds new sample points, including: (i) a tentative optimal point obtained via the continuous ...
Mohammed N. Khamees, Kai Sun
wiley +1 more source
ReChat: A Task‐Based Chatbot for EV Charging Management Optimization
IET Intelligent Transport Systems, Volume 20, Issue 1, January/December 2026.ReChat is a multilingual task‐based chatbot for EV charging management, combining supervised intent classification with a deterministic and safe task‐to‐action mapping. Experiments on six languages and an end‐to‐end Telegram prototype validate its monitoring and control capabilities.
Pablo Donate +5 more
wiley +1 more source
Blocks in flat families of finite-dimensional algebras
, 2017 We study the behavior of blocks in flat families of finite-dimensional algebras. In a general setting we construct a finite directed graph encoding a stratification of the base scheme according to the block structures of the fibers.
Thiel, Ulrich
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Weakly Idempotent Lattices and Bilattices, Non-Idempotent Plonka Functions
Demonstratio Mathematica, 2015 AbstractIn this paper, we study weakly idempotent lattices with an additional interlaced operation. We characterize interlacity of a weakly idempotent semilattice operation, using the concept of hyperidentity and prove that a weakly idempotent bilattice with an interlaced operation is epimorphic to the superproduct with negation of two equal lattices ...
Davidova D. S., Movsisyan Yu. M.
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Graph‐Based Spectrum Sensing via Quadratic Form of Adjacency Matrix
IET Radar, Sonar &Navigation, Volume 20, Issue 1, January/December 2026.This graphical abstract presents a graph‐signal‐processing‐based spectrum sensing algorithm for robust primary user detection at low signal‐to‐noise ratios (SNR). The observed signal is preprocessed via power spectrum calculation and block summation, and then transformed into a graph.
Yan Gao, Guobing Hu, Yunfei Chen
wiley +1 more source
Grothendieck quantaloids for allegories of enriched categories [PDF]
, 2011 For any small involutive quantaloid Q we define, in terms of symmetric quantaloid-enriched categories, an involutive quantaloid Rel(Q) of Q-sheaves and relations, and a category Sh(Q) of Q-sheaves and functions; the latter is equivalent to the category ...
Heymans, Hans, Stubbe, Isar
core
The Journal of Engineering, Volume 2026, Issue 1, January/December 2026.This paper investigates the attitude maneuver control without unwinding phenomenon for rigid spacecraft using a multivariable super‐twisting algorithm (MVSTA). ABSTRACT This paper investigates the attitude maneuver control without unwinding phenomenon for rigid spacecraft using a multivariable super‐twisting algorithm (MVSTA).
Yunzhe Su +4 more
wiley +1 more source
A Logratio Approach to the Analysis of Autosomal Genotype Frequencies Across Multiple Samples
Molecular Ecology Resources, Volume 26, Issue 1, January 2026.ABSTRACT More than 25 years ago, Aitchison showed that the logratio principal component analysis of multiple samples of a biallelic polymorphism can evidentiate the Hardy–Weinberg law. However, hitherto compositional data analysis, that is, the logratio approach, has had little impact in population genetics.
Jan Graffelman
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The Annals of Mathematical Statistics, 1966 The author introduces a lemma to prove rather special theorems on the independence of quadratic forms.
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