Recent content by thalesofmiletus

Thanks, that helpfull. However the mathematical conflict with footnote from the book still remains. Perhaps I should post it somewhere on math forum.

My point of view is bases on CALCULUS OF VARIATIONS by I. M. GELFANDS. and V. FOMIN. I would assume that you are familiar with the topic. I've found this book online, If needed I can provide link, but for now I don't know if it's legal in this site, so I won't. (by the way, I'm new on this site...