Results 41 to 49 of about 569 (49)

Variations in the sub-defect of doubly substochastic matrices

open access: yesSpecial Matrices
The sub-defect of a doubly stochastic matrix AA, denoted as sd(A)=⌈n−sum(A)⌉sd\left(A)=\lceil n-{\rm{sum}}\left(A)\rceil , is defined as the minimum number of rows and columns required to be added to transform the doubly substochastic matrix into a ...
Cao Lei   +2 more
doaj   +1 more source

A globally convergent flow for computing the best low rank approximation of a matrix

open access: yes, 2007
We work in the space of $m$-by-$n$ real matrices with the Frobenius inner product. Consider the following Problem: Given an m-by-n real matrix A and a positive integer k, find the m-by-n matrix with rank k that is closest to A.
Driessel, Kenneth R.
core   +2 more sources

Component graphs of vector spaces and zero-divisor graphs of ordered sets

open access: yesAKCE International Journal of Graphs and Combinatorics
In this paper, nonzero component graphs and nonzero component union graphs of finite-dimensional vector spaces are studied using the zero-divisor graph of a specially constructed 0–1-distributive lattice and the zero-divisor graph of rings.
Nilesh Khandekar   +2 more
doaj   +1 more source

Sequencing Analysis and Identification of the Primary Peptide Component of the Dialyzable Leukocyte Extract "Transferon Oral": The Starting Point to Understand Its Mechanism of Action. [PDF]

open access: yesFront Pharmacol, 2020
Vallejo-Castillo L   +10 more
europepmc   +1 more source

Pairs of k-step reachability and m-step observability matrices

open access: yesSpecial Matrices, 2013
Ferrante Augusto, Wimmer Harald K.
doaj   +1 more source

On some infinite dimensional linear groups

open access: yesOpen Mathematics, 2009
Kurdachenko Leonid   +2 more
doaj   +1 more source

Inertias and ranks of some Hermitian matrix functions with applications

open access: yesOpen Mathematics, 2012
Zhang Xiang, Wang Qing-Wen, Liu Xin
doaj   +1 more source

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