3 commits

Author	SHA1	Message	Date
Floris van Doorn	2144036cdb	feat(hott.circle): prove that the fundamental group of the circle is equal to the integers, as groups ... Also many minor fixes at various places	2015-05-18 15:59:55 -07:00
Leonardo de Moura	3912bc24c8	feat(frontends/lean): nicer syntax for 'intros' 'reverts' and 'clears'	2015-04-30 11:00:39 -07:00
Floris van Doorn	297d50378d	feat(hott): add definitions using truncations and theorems about them ... define embedding, (split) surjection, retraction, existential quantifier, 'or' connective also add a whole bunch of theorems about these definitions still has two sorry's which can be solved after #564 is closed	2015-04-29 10:04:07 -07:00