Talk:Noncommutative harmonic analysis

Can somebody explain this somehow clearer? Some sentences don't make sense, e.g. "The case of compact groups is understood, qualitatively and after the Peter–Weyl theorem from the 1920s, as being generally analogous to that of finite groups and their character theory". Why is there coma after "understood"? Sednodna (talk) 12:39, 31 January 2016 (UTC)