On the geometry of the algebraic Davis--Wielandt shell and norm-parallelism in $C^{\ast }$-algebra

Debarati Bhattacharya, Fuad Kittaneh, Arnab Patra +1

This article is devoted to the study of the Davis--Wielandt shell and the Davis--Wielandt radii of elements in a $C^{\ast }$-algebra. Utilizing a state-space approach, several geometric…