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Higher order hyperexpansivity and higher order hypercontractivity
AIMS Mathematics 2023, 8(11): 27227-27240
Published: 15 November 2023
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As a natural extension of the concept of ( m , p )-hyperexpansive and ( m , p )-hypercontractive of a single operator, we introduce and study the concepts of ( m , p )-hyperexpansivity and ( m , p )-hypercontractivity for d-tuple of commuting operators acting on Banach spaces. These concepts extend the definitions of m-isometries and ( m , p )-isometric tuples of bounded linear operators acting on Hilbert or Banach spaces, which have been introduced and studied by many authors.

Open Access Research Article Issue
A study of ( m , q )-isometric multimappings in the context of G -metric spaces
AIMS Mathematics 2025, 10(5): 11369-11381
Published: 15 May 2025
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This paper introduces and explores new concepts of ( m , q )-isometric multimappings in the context of extended metric structures. These newly defined concepts serve as extensions of the existing theory of ( m , q )-isometric multimappings in traditional metric spaces, as well as ( m , q )- G -isometric single mappings in generalized metric spaces. The study aims to broaden the understanding of isometric multimappings properties and their interactions within these extended spaces.

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