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edited Dec 14, 2020 at 18:09

user167952

Stuck in step of proof of Peter-Weyl theorem (compact quantum groups)

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asked Dec 4, 2020 at 17:49

user167952

Stuck in step of proof of Peter-Weyl theorem (compact quantum groups)

I'm reading the paper Notes on compact quantum groups. In this paper, the following theorem is proven:

Question: Why is the marked equality true?

qa.quantum-algebra c-star-algebras quantum-groups