2 commits

Author	SHA1	Message	Date
Jeremy Avigad	4a955c0f92	feat(library/algebra/order): begin theory of orders ... feat(library/algebra/order): begin theory of orders	2014-11-08 19:07:59 -08:00
Jeremy Avigad	c28227d7a1	feat(library/algebra/group): add multiplicative and additive structures	2014-11-07 10:23:37 -08:00