New generalization of norm spaces and applications

Haddadi, Mohammad Reza; Labbaf Ghasemi, Mohammad Hussein; Eftekhari, Noha

doi:10.22075/ijnaa.2022.23709.2586

New generalization of norm spaces and applications

Document Type : Research Paper

Authors

Mohammad Reza Haddadi ¹

Mohammad Hussein Labbaf Ghasemi ²

Noha Eftekhari ²

¹ Department of Mathematics, Ayatollah Boroujerdi University, Boroujerd, Iran

² Department of Pure Mathematics, University of Sharekord, Sharekord, Iran

10.22075/ijnaa.2022.23709.2586

Abstract

One of the generalizations that were studied from metric space was multiplicative metric space. The main idea was that the usual triangular inequality was replaced by a multiplicative triangle inequality. The important thing is that logarithm of every multiplicative metric is a metric. In this paper, we introduce multiplicative norm space and present three norms in bounded multiplicative operator spaces and we investigate conditions that bounded multiplicative operator spaces be complete norm multiplicative spaces. It is notable that the logarithm of every multiplicative norm is not a norm and so we have new results in multiplicative norm spaces. We give an important extension of the Hahn-Banach theorem to nonlinear operators and their ramifications and indicate some applications.

Keywords

Hahn Banach theorem

multiplicative calculus

multiplicative metric space

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