Russo-Dye theorem
Let be a unital -algebra. Then the unit ball of is the closed convex hull of the unitaries
in . Moreover, these unitary elements
are extreme points
of the unit ball.
单词 | RussoDyeTheorem |
释义 | Russo-Dye theoremLet be a unital -algebra. Then the unit ball of is the closed convex hull |
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