Commit 2022-04-12 08:46 d065fd4a

feat(ring_theory/ideal): generalize x mod I ∈ J mod I ↔ x ∈ J (#13358) We already had a lemma like this assuming I ≤ J, and we can drop the assumption if we instead change the RHS to x ∈ J \sup I. This also golfs the proof of the original mem_quotient_iff_mem.