When a $0-1$-matrix with exactly two $1$’s on each column and on each row is non-degenerated? [2]
47012
When a 0-1-matrix with exactly two 1’s on each column and on each row is non-degenerated? [1]
55031
Show any matrix $A_{n\times n}$ can be written as sum of two nonsingular matrices
147797
If $A$ is an invertible matrix, then the column span of $A$ equals $F^{n\times1}$
32064
Zero-dimensional matrices
70266
1-1 correspondence between [0,1] and [0,1)
4509
Proof that an involutory matrix has eigenvalues 1,-1
73027
Questions on symmetric matrices
133449
A proof that an orthogonal matrix with a determinant 1 is a rotation matrix
52564
$m\times n$ matrix with an even number of 1s in each row and column
145447
bilinear form - proof
898
Strictly diagonally dominant matrices are non singular
22222
Properties of zero-diagonal symmetric matrices
58021
Finding matrix $B$ is not zero matrix where $AB= 0$
86826
Almost a Vandermonde matrix
148946
If $\mathbf{A}$ is a $2\times 2$ matrix that satisfies $\mathbf{A}^2 - 4\mathbf{A} - 7\mathbf{I} = \mathbf{0}$, then $\mathbf{A}$ is invertible
40222
Matrices that are not diagonal or triangular, whose eigenvalues are the diagonal elements
38436
If an orthogonal matrix has determinant -1 then it has -1 as an eigenvalue