Results 71 to 80 of about 1,819 (238)

On diagonals of matrices doubly stochastically similar to a given matrix

Linear Algebra and its Applications, 1996
A complex matrix is called doubly quasistochastic if all its row sums and column sums are 1. Matrices \(A\) and \(B\) are doubly quasistochastically similar if \(B= SAS^{-1}\), where \(S\) is double quasistochastic. The author obtains a necessary and sufficient condition for a given matrix \(A\) to be doubly stochastically similar to a matrix with ...
openaire   +2 more sources

A face of the polytope of doubly stochastic matrices associated with certain matrix expansions

Linear Algebra and its Applications, 1997
The authors generalize the notion of staircase matrix and deal with the problem of minimizing the permanent over faces, determined by generalized staircase matrices, of the polytope \(\Omega_n\) consisting of all \(n \times n\) doubly stochastic matrices.
Hwang, Suk-Geun, Shin, Sun-Jeong
openaire   +1 more source

Loss of SHP1 in Spinal Astrocytes Triggers T‐Lymphocyte Infiltration and Nociceptive Hypersensitivity

Advanced Science, EarlyView.
Astrocyte‐specific SHP1 deletion disrupts astrocyte–vascular interactions and compromises BBB integrity while enhancing STAT1‐dependent CXCL10 expression. These changes synergistically promote peripheral CD4+ and CD8+ T‐cell infiltration into the SDH. The infiltrating T cells secrete IFN‐γ, which in turn activates microglia.
Lan‐Xing Yi, Lin Yang, Kang‐Li Wang, Hui‐Zhu Liu, Rui‐Ying Chen, Min Su, Xiao Xiao, Yu‐Qiu Zhang   +7 more
wiley   +1 more source

Leading and Beyond Leading-Order Spectral Form Factor in Chaotic Quantum Many-Body Systems Across All Dyson Symmetry Classes

Physical Review X
We show the emergence of random matrix theory (RMT) spectral correlations in the chaotic phase of generic, periodically kicked, interacting, quantum many-body systems by analytically calculating the spectral form factor (SFF), K(t), up to two leading ...
Vijay Kumar, Tomaž Prosen, Dibyendu Roy
doaj   +1 more source

p-Minors of a doubly stochastic matrix at which the permanent achieves a minimum

Linear Algebra and its Applications, 1975
AbstractThe author proves that if A is a matrix at which the permanent achieves a local minimum relative to the set of n x n doubly stochastic matrices, then for aij=0, per A (i|j)⩾per A.
openaire   +2 more sources

Single‐Cell Transcriptomics and Metabolomics Reveal Glutamate Dehydrogenase as a Central Regulator of Nitrogen Metabolic Remodeling During Alkalinity Adaptation in Crustaceans

Advanced Science, EarlyView.
Single‐cell transcriptomics reveals the cellular response of Macrobrachium hainanense to carbonate alkalinity stress. Alkalinity stress impairs branchial ammonia excretion, induces mitochondrial dysfunction, and drives cell‐type‐specific changes in gills and hemocytes.
Yiting Jin, Zhimin Lv, Chao Bian, Qibin Yang, Na Zhou, Jianguang Qin, Shengming Sun   +6 more
wiley   +1 more source

On Birkhoff's theorem for doubly stochastic completely positive maps of matrix algebras

Linear Algebra and its Applications, 1993
Let \(M_ n\) denote the algebra of \(n \times n\) complex matrices. The positive and completely positive maps of \(M_ n\) have been studied extensively. Let \(I\) denote the identity of \(M_ n\). A positive map \(\varphi\) is stochastic if \(\varphi (I)=I\).
Landau, L.J., Streater, R.F.
openaire   +2 more sources

Fundamental Challenges, Physical Implementations, and Integration Strategies for Ising Machines in Large‐Scale Optimization Tasks

Advanced Electronic Materials, EarlyView.
Ising machines are emerging as specialized hardware solvers for computationally hard optimization problems. This review examines five major platforms—digital CMOS, analog CMOS, emerging devices, coherent optics, and quantum systems—highlighting physics‐rooted advantages and shared bottlenecks in scalability and connectivity.
Hyunjun Lee, Joon Pyo Kim, Sanghyeon Kim
wiley   +1 more source

Regular bipartite multigraphs have many (but not too many) symmetries

Discrete Analysis
Regular bipartite multigraphs have many (but not too many) symmetries, Discrete Analysis 2025:22, 25 pp. This paper concerns the automorphism groups of $l$-regular bipartite multigraphs with $k$ vertices on each side, in the regime where $k$ is fixed ...
Peter J. Cameron, Coen del Valle, Colva M. Roney-Dougal   +2 more
doaj   +1 more source

Highly‐Uniform Passive Crossbar Arrays of Resistive Switching Random Access Memory (RRAM) for In‐Memory Computing Applications

Advanced Electronic Materials, EarlyView.
Passive resistive memory arrays promise efficient in‐memory computing but suffer from sneak paths and programming variability. Here, highly uniform 32 × 32 passive RRAM crossbars are programmed with multilevel precision below 3% error and 99.5% yield.
S. Ricci, P. Mannocci, M. Porzani, D. Bridarolli, F. Carletti, M. Farronato, D. Ielmini   +6 more
wiley   +1 more source