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Geometry of Banach algebra A and the bidual of L1(G)⊗ˆA

Publication Type : Journal Article

Publisher : Elsevier BV

Source : Journal of Mathematical Analysis and Applications

Url : https://doi.org/10.1016/j.jmaa.2023.128056

Keywords : Banach algebras, Arens products, Topological center, Group algebra

Campus : Haridwar

School : School of Engineering

Department : Mathematics

Year : 2024

Abstract : This article is intended towards the study of the bidual of generalized group algebra L 1 ( G , A ) equipped with two Arens products, where G is any locally compact group and A is a Banach algebra. We show that the left topological center of ( L 1 ( G ) ⊗ ˆ A ) ⁎ ⁎ is a Banach L 1 ( G ) -module if G is abelian. Further it also holds permanence property with respect to the unitization of A . We then use this fact to extend the remarkable result of A.M. Lau and V. Losert [7], about the topological center of L 1 ( G ) ⁎ ⁎ being just L 1 ( G ) , to the reflexive Banach algebra valued case using the theory of vector measures. We further explore pseudo-center of L 1 ( G , A ) ⁎ ⁎ for non-reflexive Banach algebras A and give a partial characterization for elements of pseudo-center using the Cohen's factorization theorem. In the running we also observe few consequences when A holds the Radon-Nikodym property and weak sequential completeness.

Cite this Research Publication : Lav Kumar Singh, Geometry of Banach algebra A and the bidual of L1(G)⊗ˆA, Journal of Mathematical Analysis and Applications, Elsevier BV, 2024, https://doi.org/10.1016/j.jmaa.2023.128056

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