Results 51 to 60 of about 488,412 (167)

An inverse problem in number theory and geometric group theory [PDF]

, 2022
Melvyn B. Nathanson
openalex   +1 more source

Solving an Inverse Sturm-Liouville Problem by a Lie-Group Method

Boundary Value Problems, 2008
Solving an inverse Sturm-Liouville problem requires a mathematical process to determine unknown function in the Sturm-Liouville operator from given data in addition to the boundary values.
Chein-Shan Liu
doaj   +2 more sources

The inverse Galois problem for connected algebraic groups [PDF]

, 2022
Michel Brion, Stefan Schröer
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Towards finding equalities involving mixed products of the Moore-Penrose and group inverses by matrix rank methodology

Demonstratio Mathematica
Given a square matrix AA, we are able to construct numerous equalities involving reasonable mixed operations of AA and its conjugate transpose A∗{A}^{\ast }, Moore-Penrose inverse A†{A}^{\dagger } and group inverse A#{A}^{\#}. Such kind of equalities can
Tian Yongge
doaj   +1 more source

Idempotent-Aided Factorizations of Regular Elements of a Semigroup

Mathematics
In the present paper, we introduce the concept of idempotent-aided factorization (I.-A. factorization) of a regular element of a semigroup, which can be understood as a semigroup-theoretical extension of full-rank factorization of matrices over a field ...
Miroslav Ćirić, Jelena Ignjatović, Predrag S. Stanimirović   +2 more
doaj   +1 more source

The Group Inverse of the Combinations of Two Idempotent Operators

Abstract and Applied Analysis, 2013
We present some inverses and group inverses results for linear combinations of two idempotents and their products.
Shunqin Wang, Chunyuan Deng
doaj   +1 more source

The m-weak group inverse for rectangular matrices

Electronic Research Archive
An extension of the $ m $-weak group inverse (or $ m $-WGI) on the set of rectangular matrices is provided to solve some systems of matrix equations. The extension is termed as the $ W $-weighted $ m $-WGI (or $ W $-$ m $-WGI).
D. Mosić, P. S. Stanimirović , L. A. Kazakovtsev   +2 more
doaj   +1 more source

Association between postoperative bulla neogenesis at the staple line and resected lung weight for primary spontaneous pneumothorax: a retrospective study using the inverse-probability of treatment weighted method in patients grouped according to age [PDF]

, 2016
Kenji Tsuboshima, Machiko Nagata, Teppei Wakahara, Yasumi Matoba, Yoshimasa Maniwa   +4 more
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Constructions of Mixed Reverse-Order Laws for the Products of Matrices Involving Moore–Penrose Inverses and Group Inverses

, 2023
Yongge Tian
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Weighted MP weak group inverse

Analele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica
To extent the notion of the MP weak group inverse for square matrices, we introduce the concept of the weighted MP weak group inverse for rectangular matrices.
Mosić Dijana, Marovt Janko
doaj   +1 more source