Results 211 to 220 of about 306 (236)

Invertibility of linear f-order preservers

Journal of Mathematical Sciences, 2006
The notion of \(f\)-ordering on the matrix set \(M_{m,n}({\mathbb C})\) over the field of complex numbers \({\mathbb C}\) was defined by \textit{J. Hauke, A. Markiewicz} and \textit{T. Szulc} [Linear Algebra Appl. 332--334, 437--445 (2001; Zbl 0982.15027)] in the following way. Let \(f:[0,\infty)\to [0,\infty]\) be a bijective function satisfying \(f(0)
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Real local-linearity preserving embedding

Neurocomputing, 2014
Abstract In recent years, manifold learning methods have aroused a great interest in the machine learning community. A key issue that determines the effectiveness of the manifold learning methods is how to accurately capture the local geometry of the low-dimensional manifold.
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Linear Mappings which Preserve Paracontractions

Monatshefte f�r Mathematik, 2003
A paracontraction (relative to a given norm \(\|\cdot \|\) on a vector space \({\mathbb C}^n\)) is a matrix \(A\in {\mathcal M}_n({\mathbb C})\) with the property that either \(Ax = x\) or \(\| Ax\| < \| x\|\). In this paper, the author proves that a linear surjective map \(\Phi :{\mathcal M}_n({\mathbb C})\rightarrow {\mathcal M}_n({\mathbb C ...
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Linear Maps Preserving Matrix Discriminant

Journal of Mathematical Sciences
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
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Linear preservers of Hadamard circulant majorization

Indian Journal of Pure and Applied Mathematics, 2022
G S Raju Kosuru, Kosuru G Sankara Raju
exaly  

Linear preservers for matrix inequalities and partial orderings

Linear Algebra and Its Applications, 2001
Alexander Guterman
exaly  

Linear preservers of semi-positive matrices

Linear and Multilinear Algebra, 2016
Morrison Turnansky
exaly  

Three linear preservers on infinite triangular matrices

Linear and Multilinear Algebra, 2015
Roksana Słowik
exaly  

Linear preservers of higher rank numerical ranges and radii

Linear and Multilinear Algebra, 2009
Chi-Kwong Li, Leiba Rodman, Sean Clark   +2 more
exaly  

LINEAR ORTHOGONALITY PRESERVERS OF STANDARD OPERATOR ALGEBRAS

Taiwanese Journal of Mathematics, 2010
Ngai-Ching Wong
exaly