Left inverses in a ring
21243
Kaplansky's theorem of infinitely many right inverses in monoids?
32340
Continuous bijections and their inverses
157412
Left cosets and right cosets
97608
Showing a Ring of endomorphisms is isomorphic to a Ring
75215
Properties of invertible matrices
129564
Show that $A$ is an invertible matrix if $\left(A+I\right)^3=0$ and find $A^{-1}$
127664
Inverse elements in the absence of identities/associativity.
99567
Proving that an inverse ring homomorphism of an ideal is an ideal?
154581
Ring of matrices isomorphic to $O := \left\{a+b\frac{1+\sqrt{D}}{2}: a, b \in \mathbb{Z} \right\}$
126025
Computing the inverse of a permutation
80996
A canonical construction proving $\left|HK\right| = \left|H\right|\left|K\right| / \left|H \cap K\right|$?
101313
Minimal polynomial, determinants and invertibility
66451
In a ring, how do we prove that a * 0 = 0?
87289
Find the multiplicative inverses of all the elements in $\Bbb Z_{16}^\times$
149364
Characteristic polynomial of an inverse
43683
Finding Inverse of 2 (mod m)
53113
$I-AB$ be invertible $\Leftrightarrow$ $I-BA$ is invertible