Commit 2021-07-02 18:14 dc3a995b
View on Github →feat(data/nat/gcd.lean): port from Lean 3 (except for pow_dvd_pow_iff) (#20)
- port data/nat/gcd.lean (except for pow_dvd_pow_iff)
- minor touchup
- move Dvd class and notation to top level file, like Mem
- add copyright header
- add missing imports
- gcd_induction -> gcd.induction
- simplify usages of gcd.induction via the 'induction' tactic
- remove unused import
- tiny simplification of gcd_rec proof
- use eq_zero_of_mul_eq_zero