Find the eigenvalues of a matrix with ones in the diagonal, and all the other elements equal
2271
Determinant of a rank $1$ update of a scalar matrix, or characteristic polynomial of a rank $1$ matrix
116539
Eigenvalues of matrix satisfying $A^2 = A$
53863
Making a non-diagonalizable matrix diagonalizable with an small perturbations
151276
Computing polynomial eigenvalues in Mathematica
135316
A basic question on diagonalizability of a matrix
55159
Find all matrices that commute with given matrix
149086
Determining $\mbox{tr}(A)$ and $\det(A)$ as functions of the eigenvalues of a matrix
150714
Quick question: matrix with norm equal to spectral radius
53993
Can Eigenvalues[] and Eigenvectors[] be assumed to return the same ordering?
103537
How to diagonalize this matrix...
106288
Prove that the eigenvalues of a block matrix are the combined eigenvalues of its blocks
94424
Matrices and Eigenvalues of Norm
30882
Proving Invertibility and Eigenvalues
38550
2x2 matrices with sum of diagonal entries equal zero
125569
Prove that the eigenvalues of a real symmetric matrix are real
98135
Show that the determinant of $A$ is equal to the product of its eigenvalues
63753
Eigenvalues of product of two complex matrices