Abstract Algebra - Rings and Units
37182
If an element has a unique right inverse, is it invertible?
109688
Zero-dimensional ideals and finite-dimensional algebras
41629
Structure of ideals in the product of two rings
127306
Is the group of units of a finite ring cyclic?
50908
Showing a Ring and an Ideal are equal
152013
elementary ring proof with composition of functions and addition of functions as operations
5893
On the commutative property of multiplication (domain of integers, possibly reals)
127029
Ring of formal power series finitely generated as algebra?
116883
About ideals in a ring which is a $k$ vector space
133738
Can a ring without a unit element have a subring with a unit element?
154613
Showing a set of fractions is a ring
95863
Describe the units in $\mathbb{Z}[\sqrt{-d}]$
22563
Units and Nilpotents
89864
Units in finite polynomial rings
28313
Intermediate ring between a field and an algebraic extension.
119067
Basic Ring Theory Question involving the unit element
81895
A generalisation of the fundamental theorem of algebra