Matrix over division ring having one sided inverse is invertible
3301
If $AB = I$ then $BA = I$
97781
invertible matrices connected or not
6398
Can the product of an $4\times 3$ matrix and a $3\times 4$ matrix be invertible?
20856
Inverse of Linear Transformations
130268
How to prove that a nilpotent matrix is not invertible?
66729
For a square matrix $A$ presence of $n$ linearly independent eigenvectors implies full rank, thereby invertible?
17059
A ring element with a left inverse but no right inverse?
37182
If an element has a unique right inverse, is it invertible?
65305
Minimal polynomial for an invertible matrix and its determinant
114271
Why is a matrix invertible if it can be written as the product of elementary matrices?
94378
Is Linear transformations $T_1,T_2 : \mathbb{R}^n\rightarrow \mathbb{R}^n$ Invertible?
65432
Prove that every elementary matrix is invertible, and the inverse is again an elementary matrix.
142307
Counting invertible $0$-$1$ matrices that remain invertible under negating the diagonal
24441
Inverse of a matrix is expressible as a polynomial?
51406
Determinant of a block matrix times the determinant of the inverse of a block
55018
Prove that $A^*A + I$ is invertible
80616
A ring with few invertible elements