trick, that can be used in many mathematical situations. With such tricks, it is usually difficult, and in any case not desirable, to formalize them as lemmas: if you try to do so then almost certainly your formal lemma will not apply in all the situations where the trick does.
Of course, in many cases, the devil really is in the details, but nevertheless knowing the overall strategy of proof is extremely valuable when trying to read that proof.
Yong-Hui Says:
November 3, 2008 at 5:57 pm | Reply
I am in MSRI for the cofference discrete Rigity. Green will give the first lecture.
I just happen to find a question for that tricki wiki:
Whether is there a common-shared refference system for that tricki wiki? Similar to that of Mathscinet of ams math review
It will be a basic instrument for a mathematical website.