New posts in ideals

Finitely generated idempotent ideals are principal: proof without using Nakayama's lemma

Bijection between sets of ideals

When do (multivariate) polynomial rings fail to be Prüfer rings?

Is $(xy-1)$ a maximal ideal in $\mathbb C[x,y]$?

Neat way to find the kernel of a ring homomorphism

Ideals of the algebra of all bounded linear operators on $\ell_p \oplus \ell_q$

All polynomial parametric curves in $k^2$ are contained in affine algebraic varieties

Prove the Ring Homomorphism is Surjective

Preimage of a maximal ideal.

Canonical map $R/(I\cap J)\rightarrow R/I\times _{R/(I+J)} R/J$ is an isomorphism

In $\mathbb{Z}/(n)$, does $(a) = (b)$ imply that $a$ and $b$ are associates?

Prove the Radical of an Ideal is an Ideal

Prime ideals of a finite direct product ring

Factoring the ideal $(8)$ into a product of prime ideals in $\mathbb{Q}(\sqrt{-7})$

Ideals in the ring of endomorphisms of a vector space of uncountably infinite dimension.

Primary decomposition of $(XY,(X-Y)Z)$ in $k[X,Y,Z]$

Why these are isomorphic each other for given these rings?

Understanding the Inertia Group in Ramification Theory

If $A + B = R$ and $A+C=R$ then $A+BC=R$ and $A \cap BC = ABC$

Algebraic number theory, Marcus, Chapter 3, Question 9