Do $AB$ and $BA$ have the same eigenvalues?
31606
Do matrices $ AB $ and $ BA $ have the same minimal and characteristic polynomials?
63753
Eigenvalues of product of two complex matrices
55377
Non-zero eigenvalues of $AA^T$ and $A^TA$
76200
Is the rank of $AB$ always equal to the rank of $BA$?
16439
What are the eigenvalues of matrix that have all elements equal 1?
8920
There exists $C\neq0$ with $CA=BC$ iff $A$ and $B$ have a common eigenvalue
154666
similar matrices have same eigenvalue... stuck
33591
Product of two matrices sharing the same eigenvector
90576
Symmetric matrix eigenvalues
10828
If $A^2 = I$, then $A$ is diagonalizable, and is $I$ if $1$ is its only eigenvalue
24454
The relationship between the eigenvalues of matrices $XY$ and $YX$
128453
If $A$ has two eigenvalues $\lambda _1, \lambda_2$ and $\dim (E_{\lambda_1})=n-1$, then $A$ is diagonalizable
76477
Eigenvalues with transpose question.
81868
How to prove $\operatorname{Tr}(AB) = \operatorname{Tr}(BA)$?
150228
If $E$ has eigenvalues $\lambda_1, \ldots, \lambda_n$, then $B \mapsto [E,B] = EB - BE$ has eigenvalues $\lambda_i - \lambda_j$.
150376
Does Real Eigenvalues mean it is an hermitian Matrix
30923
Is the matrix $A^*A$ and $AA^*$ hermitian?