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