feat(Analysis/CStarAlgebra): set of star projections equals the extreme points of the nonnegative closed unit ball#36201
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PR summary 82ff5788d3Import changes for modified filesNo significant changes to the import graph Import changes for all files
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I've removed my assignment since my name is listed as one of the authors of the new file. |
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I'm afraid I don't know enough about the area to meaningfully review this. In my opinion, if @j-loreaux , @themathqueen and @JonBannon are happy with each others' contributions, then that is convincing enough. |
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An element in a non-unital C⋆-algebra is a projection iff it is an extreme point of the nonnegative closed unit ball. This is from 1.6.2 in Sakai's C⋆-algebras and W⋆-algebras (the proof is different though).
Co-authored-by: Jon Bannon [email protected]