"information theory" A Mathematical Theory of Communication, Shannon, http://math.harvard.edu/~ctm/home/text/others/shannon/entropy/entropy.pdf http://math.har

"information theory" A Mathematical Theory of Communication, Shannon, http://math.harvard.edu/~ctm/home/text/others/shannon/entropy/entropy.pdf http://math.harvard.edu/~ctm/home/text/others/shannon/entrop...