Hello world!
TakuyaMurata, regarding the edit at Normal operator, I did not understand the claim that implies . It seems blatantly wrong in the case of real Hilbert spaces, for example, since there we have for any operator .
Hello world!
TakuyaMurata, regarding the edit at Normal operator, I did not understand the claim that implies . It seems blatantly wrong in the case of real Hilbert spaces, for example, since there we have for any operator .