2 commits

Author	SHA1	Message	Date
Jeremy Avigad	4420f0dc0c	feat(library/algebra/group): add ordered semigroups	2014-11-17 18:32:14 -08:00
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