https://9dok.net/document/y6emrj84-iscalledameasureofmaximalentropy-invariantprobabilitymeasure-theoreticalentropyarerelatedbythevariationprinciplewhichsaythat-inthislecturewestartdiscussingthenotionofentropy-whichisindependentofinvariantmeasures-andinergodictheorythereismeasure-alsomisnam.html