Commit 2026-03-10 06:45 5c8398df
View on Github →feat(RingTheory): add the class HasFiniteQuotients (#35530)
As discussed on Zulip, this PR add the class of commutative rings R such that, for all nonzero ideals I of R, the quotient R ⧸ I is finite and prove several results including:
- If
Rhas finite quotients then it has dimension ≤ 1 - If
Rhas finite quotients then it is a Noetherian ring - Assume that
Ra finite quotients and thatSis a domain and a finiteR-module. ThenShas finite quotients - A domain that is also a finite
ℤ-module has finite quotients. Also add two instances: - Assume that
Sis a finiteR-module and thatS ⧸ Jis a(R ⧸ I)-module withI, resp.J, an ideal ofR, resp.S, thenS ⧸ Jis a finite(R ⧸ I)-module. - For nonzero
n,ℤ ⧸ Ideal.span {n}is finite.