Invertible matrix if the sum of the absolute values of a column is lower than the absolute of the diagonal value
898
Strictly diagonally dominant matrices are non singular
97733
Can it be determined that the sum of the diagonal entries, of matrix A, equals the sum of eigenvalues of A
108589
The inverse of the matrix $\{1/(i+j-1)\}$
118061
How to check if a matrix is diagonizable?
3151
Elegant operations on matrix rows and columns
117293
sufficient and necessary conditions for matrix to be diagonalize or triangular
17584
Integer matrices with integer inverses
35834
Is the product of any two invertible diagonalizable matrices diagonalizable?
98631
Postive-semidefiniteness of matrix with entries $1/(a_i+a_j)$
8557
Invertible Matrices are dense
66729
For a square matrix $A$ presence of $n$ linearly independent eigenvectors implies full rank, thereby invertible?
125889
Determinant of rank-one perturbations of (invertible) matrices
78307
Under what conditions is $AA^T$ invertible?
136329
A matrix is similar to its transpose
25682
If $A$ is an $m\times n$ matrix, $B$ is an $n\times m$ matrix and $n<m$, then $AB$ is not invertible.
138104
Algebra-sum of entries in each column of a sqaure matrix = constant
108012
A matrix $M$ that commutes with any matrix is of the form $M=\alpha I$