Results 1 to 10 of about 1,327,597 (288)

Asymptotics for incidence matrix classes [PDF]

open access: yesThe Electronic Journal of Combinatorics, 2006
We define {\em incidence matrices} to be zero-one matrices with no zero rows or columns. A classification of incidence matrices is considered for which conditions of symmetry by transposition, having no repeated rows/columns, or identification by ...
Cameron, Peter   +2 more
core   +4 more sources

Gaps between classes of matrix monotone functions [PDF]

open access: yesBulletin of the London Mathematical Society, 2002
We prove the existence of gaps between all the different classes of matrix monotone functions defined on an interval, provided the interval is non trivial and different from the whole real line.
Hansen, Frank   +2 more
core   +3 more sources

On products of conjugacy classes in general linear groups [PDF]

open access: yesInternational Journal of Group Theory, 2022
Let $K$ be a field and $n\geq 3$. Let $E_n(K)\leq H\leq GL_n(K)$ be an intermediate group and $C$ a noncentral $H$-class. Define $m(C)$ as the minimal positive integer $m$ such that $\exists i_1,\ldots,i_m\in\{\pm 1\}$ such that the product $C^{i_1 ...
Raimund Preusser
doaj   +1 more source

The solutions of two classes of dual matrix equations

open access: yesAIMS Mathematics, 2023
The solvability conditions for the dual matrix equation $ AXB = D $ and a pair of dual matrix equations $ AX = C $ and $ XB = D $ are deduced by applying the singular value decomposition, and the expressions of the general solutions to these dual matrix ...
Yinlan Chen   +3 more
doaj   +1 more source

Studying the Classification of Texture Images by K-Means of Co-Occurrence Matrix and Confusion Matrix

open access: yesIbn Al-Haitham Journal for Pure and Applied Sciences, 2023
In this research, a group of gray texture images of the Brodatz database was studied by building the features database of the images using the gray level co-occurrence matrix (GLCM), where the distance between the pixels was one unit and for four angles (
Haider S. Kaduhm   +1 more
doaj   +1 more source

Majorization for matrix classes [PDF]

open access: yesLinear Algebra and its Applications, 2018
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Geir Dahl   +2 more
openaire   +4 more sources

A class of symmetric and non-symmetric band matrices via binomial coefficients

open access: yesSpecial Matrices, 2021
Symmetric matrix classes of bandwidth 2r + 1 was studied in 1972 through binomial coefficients. In this paper, non-symmetric matrix classes with the binomial coefficients are considered where r + s + 1 is the bandwidth, r is the lower bandwidth and s is ...
Micheal Omojola, Kilic Emrah
doaj   +1 more source

The binomial sequence spaces of nonabsolute type

open access: yesJournal of Inequalities and Applications, 2016
In this paper, we introduce the binomial sequence spaces b 0 r , s $b^{r,s}_{0}$ and b c r , s $b^{r,s}_{c}$ of nonabsolute type which include the spaces c 0 $c_{0}$ and c, respectively.
Mustafa Cemil Bişgin
doaj   +1 more source

Revisiting of the BT-inverse of matrices

open access: yesAIMS Mathematics, 2021
In this paper, we discuss different characteristics of the BT-inverse of a square matrix introduced by Baksalary and Trenkler [On a generalized core inverse, Appl. Math. Comput., 236 (2014), 450-457].
Wanlin Jiang, Kezheng Zuo
doaj   +1 more source

Deep Residual Expression Recognition Network to Enhance Inter-class Discrimination [PDF]

open access: yesJisuanji kexue yu tansuo, 2022
Deep facial expression recognition is a challenging task for neural networks to apply in pattern reco-gnition. Compared with face recognition tasks such as identity authentication and feature point recognition, there are a lot of redundant information in
HUANG Hao, GE Hongwei
doaj   +1 more source

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