Results 31 to 40 of about 4,755,611 (236)

Jordan embeddings and linear rank preservers of structural matrix algebras [PDF]

Linear Algebra and its Applications
We consider subalgebras $\mathcal{A}$ of the algebra $M_n$ of $n \times n$ complex matrices that contain all diagonal matrices, known in the literature as the structural matrix algebras (SMAs). Let $\mathcal{A} \subseteq M_n$ be an arbitrary SMA.
Ilja Gogi'c, Mateo Tomašević
semanticscholar   +1 more source

Contractivity-preserving implicit linear multistep methods [PDF]

Mathematics of Computation, 1989
We investigate contractivity properties of implicit linear multistep methods in the numerical solution of ordinary differential equations. The emphasis is on nonlinear and linear systems d d t U ( t ) = f ( t , U (
openaire   +1 more source

Reciprocal control of viral infection and phosphoinositide dynamics

FEBS Letters, EarlyView.
Phosphoinositides, although scarce, regulate key cellular processes, including membrane dynamics and signaling. Viruses exploit these lipids to support their entry, replication, assembly, and egress. The central role of phosphoinositides in infection highlights phosphoinositide metabolism as a promising antiviral target.
Marie Déborah Bancilhon, Bruno Mesmin
wiley   +1 more source

Some linear preserver problems on block triangular matrix algebras

, 2003
In this article we classify rank-one nonincreasing maps ψ on n-square block triangular matrix algebras with the assumption that ψ(In) is of rank n. As applications, we obtain complete classifications of adjugate-commuting maps, and compound-commuting ...
W. L. Chooi, M. Lim
semanticscholar   +1 more source

Linear preservers of secant varieties and other varieties of tensors [PDF]

Journal of symbolic computation
We study the problem of characterizing linear preserver subgroups of algebraic varieties, with a particular emphasis on secant varieties and other varieties of tensors.
Fulvio Gesmundo, Y. Han, Benjamin Lovitz
semanticscholar   +1 more source

By dawn or dusk—how circadian timing rewrites bacterial infection outcomes

FEBS Letters, EarlyView.
The circadian clock shapes immune function, yet its influence on infection outcomes is only beginning to be understood. This review highlights how circadian timing alters host responses to the bacterial pathogens Salmonella enterica, Listeria monocytogenes, and Streptococcus pneumoniae revealing that the effectiveness of immune defense depends not only
Devons Mo, Catherine S. Palmer, Jacqueline M. Kimmey   +2 more
wiley   +1 more source

Linear Preservers of Chain Majorization

Journal of Mathematical Extension, 2008
For (n×m matrices) X, Y ∈ Mnm(R)(= Mnm), we say X is chain majorized by Y and write X ≺≺ Y if X = RY where R is a product of finitely many T-transforms. A linear operator T : Mnm → Mnm is said to be a linear preserver of the relation ≺≺ on Mnm if X ≺≺
P. Torabian
doaj  

Interplay between circadian and other transcription factors—Implications for cycling transcriptome reprogramming

FEBS Letters, EarlyView.
This perspective highlights emerging insights into how the circadian transcription factor CLOCK:BMAL1 regulates chromatin architecture, cooperates with other transcription factors, and coordinates enhancer dynamics. We propose an updated framework for how circadian transcription factors operate within dynamic and multifactorial chromatin landscapes ...
Xinyu Y. Nie, Jerome S. Menet
wiley   +1 more source

Linear maps preserving fibers

, 2007
Let $G\subset\GL(V)$ be a complex reductive group where $\dim ...
openaire   +3 more sources

Linear preservers on matrices

Linear Algebra and its Applications, 1987
Let \(M_ n(F)\) denote the set of \(n\times n\) matrices with entries in a field F. Linear maps \(L: M_ n(F)\to M_ n(F)\) are considered such that L(adj A)\(=adj(L(A))\) for all \(A\in M_ n(F)\) where F is infinite. For F equal to either the real or complex numbers linear maps are considered which preserve the idempotent matrices and satisfy \(L(I_ n ...
Chan, G.-H., Lim, M.-H., Tan, K.-K.
openaire   +1 more source