New posts in Commutative Algebra

Simplest proof/greatest generality in which $|R/(\det A) R| = |R^n/A R^n|$

Simple minded details about why a particular map is étale

Is there a finite quotient Dedekind domain with infinitely many primes of small norm?

Are these strengthenings of Serre-Swan and Gelfand-Naimark true?

Is $0 \to p \to R_p \to Frac(R/p) \to 0$ exact sequence?

Turning an Abelian Group into a Vector Space

Can the zero set of an irreducible polynomial contain a non-empty Zariski open subset?

Why do I expect $\operatorname{Spec}(\Bbb Q(i)\otimes_{\mathbb Q} \Bbb Q(i))$ contains 2 points?

Localization at a multiplicative set is a localization at a prime ideal if local

Why $k[[x^2,x^3]]$ is dimension 1 obvious?