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arxiv: 1604.02812 · v1 · pith:ZR4WAVBRnew · submitted 2016-04-11 · 🧮 math.FA · math.OA

C*-Convexity of Norm Unit Balls

classification 🧮 math.FA math.OA
keywords m-normsmaximumnormunitballballscallcases
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We determine those norms on B(H) whose unit ball is C*-convex. We call them M-norms and show that the class of M-norms less than a given norm enjoys a maximum element. These minimum and maximum elements will be determined in some cases. Finally, we give a constructive result to obtain M-norms on B(H).

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