Inversion of a matrix with zero diagonal elements
517
Determinant of a specially structured matrix ($a$'s on the diagonal, all other entries equal to $b$)
149981
Find the eigenvalues and eigenvectors with zeroes on the diagonal and ones everywhere else.
10014
Is there a built-in procedure for simultaneous diagonalization of a set of commuting matrices?
78265
Diagonalizable matrix with parameters
96811
How to find the eigenvalues of a block-diagonal matrix?
4917
Inverse of this $3\times 3$ matrix using the Cayley–Hamilton theorem
142307
Counting invertible $0$-$1$ matrices that remain invertible under negating the diagonal
155272
Is a matrix with $1$s in the diagonal and off-diagonal entries with absolute value less than $1$ invertible?
113518
Determinant of the inverse matrix
52260
Diagonalization and eigenvalues
18585
Showing $A-I$ is invertible, when $A$ is a skew-symmetric matrix
122434
Adjoint of a matrix and inverse of a matrix
143051
Inverting noninvertible elements in a bigger ring.
95387
Mathematical expression to form a vector from diagonal elements
4517
Showing a $2\times2$ matrix is invertible
5475
Derivative of the inverse of a matrix
80751
diagonalisability of matrix few properties