How to prove that these two matrices have the same eigenvalues?
106986
Eigenvalues of $AB$ and $BA$
147903
Similar matrices-Identity
85581
Matrices commute if and only if they share a common basis of eigenvectors?
6514
Prove $T$ has at most two distinct eigenvalues
151332
If $A,B$ have eigenvalues $\pm1$, what can I say about the eigenvalues of $AB,BA$?
7457
Prove that $J^+AJ$ has positive eigenvalues
96811
How to find the eigenvalues of a block-diagonal matrix?
120867
How prove this two symmetric matrices $AB=0$
97733
Can it be determined that the sum of the diagonal entries, of matrix A, equals the sum of eigenvalues of A
22222
Properties of zero-diagonal symmetric matrices
29788
Eigenvalues of a matrix whose square equals its transpose
24454
The relationship between the eigenvalues of matrices $XY$ and $YX$
37162
Prove that matrices have equal rank.
36613
Prove that simultaneously diagonalizable matrices commute
90964
Prove: symmetric positive definite matrix
95717
Same eigenvalues, but not similar
124001
Are the eigenvalues of the sum of two positive definite matrices increased?