New posts in Commutative Algebra

Identity relating coefficients of degrees $0$ and $1$ from characteristic polynomials

Functorial morphisms on the identity functor

Field with characteristic zero is vector space over $\mathbb{Q}$

Is there a unique homomorphism from a ring to its field of fractions?

Localization as dual to quotienting?

Nice exercises on Hilbert's basis theorem

Non-unital ring of rational numbers with even numerator and odd denominator has no maximal ideals

How do we prove intuitionistically that free modules of finite rank are projective?

Zerodimensional, compact space is homeomorphic to spectrum of some ring -- elementary attempt

$A$ reduced implies $A\otimes_k K$ reduced, for $k$ perfect.