Schauder-Type Fixed Point Theorem in Generalized Fuzzy Normed Linear Spaces

In the present article, the Schauder-type fixed point theorem for the class of fuzzy continuous, as well as fuzzy compact operators is established in a fuzzy normed linear space (fnls) whose underlying <i>t</i>-norm is left-continuous at <inline-formula><math display="inlin...

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Bibliographic Details
Main Authors: S. Chatterjee, T. Bag, Jeong-Gon Lee
Format: Article
Language:English
Published: MDPI AG 2020-09-01
Series:Mathematics
Subjects:
Online Access:https://www.mdpi.com/2227-7390/8/10/1643
Description
Summary:In the present article, the Schauder-type fixed point theorem for the class of fuzzy continuous, as well as fuzzy compact operators is established in a fuzzy normed linear space (fnls) whose underlying <i>t</i>-norm is left-continuous at <inline-formula><math display="inline"><semantics><mrow><mo>(</mo><mn>1</mn><mo>,</mo><mn>1</mn><mo>)</mo></mrow></semantics></math></inline-formula>. In the fuzzy setting, the concept of the measure of non-compactness is introduced, and some basic properties of the measure of non-compactness are investigated. Darbo’s generalization of the Schauder-type fixed point theorem is developed for the class of <inline-formula><math display="inline"><semantics><mi>ψ</mi></semantics></math></inline-formula>-set contractions. This theorem is proven by using the idea of the measure of non-compactness.
ISSN:2227-7390