Arens Products and Asymptotic Structures on Chébli-Trimèche Hypergroups under Low Regularity Conditions

Saeed Hashemi Sababe

Paper

Arens Products and Asymptotic Structures on Chébli-Trimèche Hypergroups under Low Regularity Conditions

Abstract

We investigate the Arens products on the second duals of convolution algebras associated with Chébli--Trimèche hypergroups, particularly focusing on the left and right topological centres of

and

. Building on the recent framework established by Losert, we relax the classical smoothness assumptions on the underlying Sturm--Liouville function

and develop new asymptotic analysis tools for measure-valued and low-regularity perturbations. This allows us to extend the existence and continuity of the asymptotic measures

and the limit measure

to a strictly larger class of hypergroups. We further provide new necessary and sufficient conditions for strong Arens irregularity of

in terms of the spectral behaviour of

, explore weighted (Beurling-type) hypergroup algebras, and obtain the first detailed comparison between the left and right topological centres for a wide class of non-classical examples. Several concrete applications to Jacobi, Naimark, and Bessel--Kingman hypergroups are presented.