I quote;
I struggle with the last sentence and putting the pieces together. I know the abstract change of variables formula for ##\nu## on ##(F,\mathcal D)## being the pushforward measure of ##\mu## on ##(E,\mathcal C)## under ##\varphi:E\to F##, i.e. ##\nu(A)=\mu(\varphi^{-1}(A))## for every...