Mathematical (and any other related e. g. statistical/economic...) Notation System I would like to ask where I could find really extensive source (websites, books, whatever you are aware of) for studying purposes in terms of mathematical notations. This is really a must for me, because whenever I try to study some kind of a problem I encounter mathematical notations which should help me to understand the concept that is being explained, but in the end I do not understand what is being explained but I am only intimidated by the notations.

CW Answer to push it out of unanswered queue:
You could try mathcentre.ac.uk and Wikipedia article
