2 commits

Author	SHA1	Message	Date
Jeremy Avigad	70407473c2	feat(library/theories/combinatorics/choose): begin theory of binomial coefficients	2015-07-11 19:01:43 -04:00
Leonardo de Moura	e33946ff02	feat(library/data/nat/fact): define factorial	2015-07-02 20:25:34 -07:00