Results 21 to 30 of about 15,991 (314)

New Extremal Bounds for Reachability and Strong-Connectivity Preservers under Failures [PDF]

International Colloquium on Automata, Languages and Programming, 2020
In this article, we consider the question of computing sparse subgraphs for any input directed graph \(G=(V,E)\) on n vertices and m edges that preserves reachability and/or strong-connectivity structures.
Diptarka Chakraborty, Keerti Choudhary
semanticscholar   +1 more source

Preserving preservation

Journal of Symbolic Logic, 2005
AbstractWe prove that the property “P doesn't make the old reals Lebesgue null” is preserved under countable support iterations of proper forcings, under the additional assumption that the forcings are nep (a generalization of Suslin proper) in an absolute way. We also give some results for general Suslin ccc ideals.
Jakob Kellner, Saharon Shelah
openaire   +3 more sources

Linear preservers ‎of acu-majorization on ‎$‎‎\mathbb{R}^3‎$ and ‎$‎M_{3,m}‎$‎‎‎ [PDF]

Journal of Mahani Mathematical Research
‎‎In this note, we present an equivalent condition for linear preservers of group majorization induced by closed subgroup $G$ of $O(\mathbb{R}^n)$. Moreover, a new concept of majorization  is defined on $\mathbb{R}^3$ as acu-majorization and this is ...
Mohammad Soleymani
doaj   +1 more source

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

Preservers of totally positive kernels and Pólya frequency functions [PDF]

Mathematics Research Reports, 2021
Fractional powers and polynomial maps preserving structured totally positive matrices, one-sided Polya frequency functions, or totally positive kernels are treated from a unifying perspective.
A. Belton, D. Guillot, A. Khare, M. Putinar   +3 more
semanticscholar   +1 more source

Resource Preservability [PDF]

Quantum, 2020
Resource theory is a general, model-independent approach aiming to understand the qualitative notion of resource quantitatively. In a given resource theory, free operations are physical processes that do not create the resource and are considered zero-cost.
openaire   +5 more sources

A note on $2$-plectic vector spaces [PDF]

Journal of Mahani Mathematical Research, 2023
Among the $2$-plectic structures on vector spaces, the canonical ones and the $2$-plectic structures induced by the Killing form on semisimple Lie algebras are more interesting.
Mohammad Shafiee
doaj   +1 more source

Immanant Conversion on Symmetric Matrices

Special Matrices, 2014
Letr Σn(C) denote the space of all n χ n symmetric matrices over the complex field C. The main objective of this paper is to prove that the maps Φ : Σn(C) -> Σn (C) satisfying for any fixed irre- ducible characters X, X' -SC the condition dx(A +aB) = dχ·(
Purificação Coelho M., Duffner M. Antónia, Guterman Alexander E.   +2 more
doaj   +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

Automatic continuity of biorthogonality preservers between weakly compact JB*-triples and atomic JBW*-triples [PDF]

We prove that every biorthogonality preserving linear surjection from a weakly compact JB∗triple containing no infinite dimensional rank-one summands onto another JB∗-triple is automatically continuous.
M. Burgos, Jorge J. Garc'es, A. Peralta
semanticscholar   +1 more source