Let $T \subseteq \mathbb{R}^n$. Let $T$ be convex and such that if $a \in T$ than $-a \in T$. How is $T$ called? Is it a class of sets which is denominated in some way and studied?
2026-03-24 22:06:26.1774389986
What are these sets?
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Rudin calls these sets "balanced sets". Convex-analysts call them "centrally symmetric".