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| rev | Bot | (Created page with "<div class="d-none"><math> \newcommand{\mathds}{\mathbb}</math></div>Given a finite group <math>H</math>, setting <math>A=C^*(H)</math>, prove that the maps <math display="block"> \Delta:A\to A\otimes A </math> <math display="block"> \varepsilon:A\to\mathbb C </math> <math display="block"> S:A\to A^{opp} </math> given by the formulae <math>\Delta(g)=g\otimes g</math>, <math>\varepsilon(g)=1</math>, <math>S(g)=g^{-1}</math> and linearity, are subject to the same cond...") | Apr 20'25 at 1:32 | +767 |