Browsing Research Articles (Mathematics and Applied Mathematics) by Author "Cobzas, Stefan"

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Ekeland variational principle and some of its equivalents on a weighted graph, completeness and the OSC property

Ali, Basit; Cobzas, Stefan; Mabula, M.D. (MDPI, 2023-03)

We prove a version of the Ekeland Variational Principle (EkVP) in a weighted graph G and its equivalence to Caristi fixed point theorem and to the Takahashi minimization principle. The usual completeness and topological ...
Zabrejko's lemma and the fundamental principles of functional analysis in the asymmetric case

Mabula, Mokhwetha Daniel; Cobzas, Stefan (Elsevier, 2015-04)

Some versions of the fundamental principles of the functional analysis in asymmetric normed spaces – the Open Mapping Theorem, the Closed Graph Theorem and the Uniform Boundedness Principle – are proved. The proofs are ...

Now showing items 1-2 of 2

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