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Listar por palabra clave "Partial order"

Mostrando ítems 1-7 de 7

A simultaneous canonical form of a pair of matrices and applications involving the weighted Moore-Penrose inverse

Thome, Néstor (Elsevier, 2016-03)

In this paper, a simultaneous canonical form of a pair of rectangular complex matrices is developed. Using this new tool we give a necessary and sufficient condition to assure that the reverse order law is valid for the ...
Fixed points of α-Θ-Geraghty type and Θ-Geraghty graphic type contractions

Onsod, Wudthichai; Kumam, Poom; Cho, Yeol Je (Universitat Politècnica de València, 2017-04-03)

[EN] In this paper, by using the concept of the α-Garaghty contraction, we introduce the new notion of the α-Θ-Garaghty type contraction and prove some fixed point results for this contraction in partial metric spaces. ...
From projectors to 1MP and MP1 generalized inverses and their induced partial orders

Hernández, M. V.; Lattanzi, M. B.; Thome, Néstor (Springer-Verlag, 2021-07)

[EN] This paper deals with new generalized inverses of rectangular complex matrices, namely 1MP and MP1-inverses. They are constructed from oblique projectors represented by means of inner generalized inverses, by using ...
Multiple fixed point theorems for contractive and Meir-Keeler type mappings defined on partially ordered spaces with a distance

Choban, Mitrofan M; Berinde, Vasile (Universitat Politècnica de València, 2017-10-02)

[EN] We introduce and study a general concept of multiple fixed point for mappings defined on partially ordered distance spaces in the presence of a contraction type condition and appropriate monotonicity properties. This ...
On 2MP-, MP2- and C2MP-inverses for rectangular matrices

Hernández, M. V.; Lattanzi, Marina B.; Thome, Néstor (Springer-Verlag, 2022-10)

[EN] This paper introduces 2MP-inverses, MP2-inverses, and C2MP-inverses, for rectangular matrices following a different approach to that used in the recent literature. These new inverses generalize some classical inverses ...
On Protected Quasi-Metrics

Romaguera Bonilla, Salvador (MDPI AG, 2024-03)

[EN] In this paper, we introduce and examine the notion of a protected quasi-metric. In particular, we give some of its properties and present several examples of distinguished topological spaces that admit a compatible ...
The star partial order and the eigenprojection at 0 on EP matrices

Hernández, Araceli Elisabet; Lattanzi, Marina Beatriz; Thome, Néstor; Urquiza, Fabián (Elsevier, 2012-07-01)

[EN] The space of n x n complex matrices with the star partial order is considered in the first part of this paper. The class of EP matrices is analyzed and several properties related to this order are given. In addition, ...