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Mar 1, 2021 at 13:52 comment added Marcel @YCor How can it be described, how the cosets can be represented, what is its topology or even geometry, etc.
Mar 1, 2021 at 13:33 comment added YCor "what is $U(d)/R_{n,d}$": could you be more specific? what is it in which respect?
Mar 1, 2021 at 13:23 history asked Marcel CC BY-SA 4.0