Sufficient condition for the inverse of a matrix
3301
If $AB = I$ then $BA = I$
4917
Inverse of this $3\times 3$ matrix using the Cayley–Hamilton theorem
125021
Inverse of an invertible upper triangular matrix of order 3
117293
sufficient and necessary conditions for matrix to be diagonalize or triangular
155272
Is a matrix with $1$s in the diagonal and off-diagonal entries with absolute value less than $1$ invertible?
126990
Invertible matrix and inverse matrix
145768
The inverse of a matrix in which the sum of each row is $1$
74341
Proving an invertible matrix which is its own inverse has determinant $1$ or $-1$
101452
How is the determinant related to the inverse of matrix?
135316
A basic question on diagonalizability of a matrix
85550
Positive definiteness of difference of inverse matrices
4517
Showing a $2\times2$ matrix is invertible
20856
Inverse of Linear Transformations
52040
"Inverse" of an $n\times k$ matrix.
126337
Eigenvalues in orthogonal matrices
48238
Prove the positive definiteness of Hilbert matrix
52587
Real analysis : Problem related to inverse