Banach Spaces Which are Isometric to Subspaces of c0(Γ)

• 作者: Li Xin CHENG Jian Jian WANG
• 来源期刊: 数学学报（英文版）
• 年，卷（期）: 2021,（8）
• 页码范围: 1171-1178
• 页数: 8页
• 语种: 英文

摘要

In this paper,we give a number of characterizations for a Banach space X which is isometric to a subspace of c0,or,c0(Γ),successively,in terms of extreme points of its dual unit ball Bx*,Fréchet and Gateaux derivatives of its norm,or,in terms of w*-strongly exposed points and w*-exposed points of Bx*.