5 commits

Author	SHA1	Message	Date
Egbert Rijke	af70424d60	work on SES	2017-01-26 16:55:59 -05:00
Floris van Doorn	b08457c77f	move things to the Lean library, and update after changes in the Lean library	2016-11-24 00:11:55 -05:00
Steve Awodey	e87c235e24	WIP on exact couple and basic group theory	2016-11-10 16:49:09 -05:00
Egbert Rijke	81e6c07f23	progress on derived exact couples	2016-11-03 16:42:12 -04:00
Egbert Rijke	1b09aee650	initiating exact couples	2016-10-20 16:23:55 -04:00