The set of all absolute normalized norms on (denoted by ) has a convex structure with respect to the usual operation. In a previous article, N. Komuro, K.-S. Saito, and K.-I. Mitani calculated the James constants of when is an extreme point of . In this article, we calculate the James constant of its dual space.
"Dual of extremal absolute norms on and the James constant." Banach J. Math. Anal. 10 (2) 251 - 266, April 2016. https://doi.org/10.1215/17358787-3492677