New posts in Ring Theory

Example of an algebra which is not isomorphic to its opposite

$\begin{pmatrix} a & b \\ 0 & c \end{pmatrix}$ has an inverse $\implies a,c$ have inverses?

How many ideals contain $(x^2+1)$ in $\mathbb{Z}_4[x]$?

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

Determine under what circumstances an involution on R is an automorphism

Map from polynomial to polynomial function

The intuition behind the idea of 'embedding' in rings

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

Localization as dual to quotienting?

Places of an algebraic number field