Commit 2021-04-14 23:14 5052ad95
View on Github →feat(data/nat/basic): (∀ a : ℕ, m ∣ a ↔ n ∣ a) ↔ m = n (#7132)
... and the dual statement
(∀ a : ℕ, a ∣ m ↔ a ∣ n) ↔ m = n
Zulip discussion:
https://leanprover.zulipchat.com/#narrow/stream/113489-new-members/topic/semilattice.2C.20dvd.2C.20associated