$\lambda^2$ is an eigenvalue of $T^2$
9220
If $\lambda$ is an eigenvalue of $A^2$, then either $\sqrt{\lambda}$ or $-\sqrt{\lambda}$ is an eigenvalue of $A$
18939
Eigenvalues of the transpose
110086
Let $A$ be an $m \times n$ matrix. Show $A^TA$ and $AA^T$ have the same eigenvalues
100968
Why is $|e^{i \lambda z}| |e^{- \lambda y}|= |e^{- \lambda y}|$ here?
54099
What are the eigenvalues of $\operatorname{ad}x$?
124583
A question about eigenvalues of $5\times5$ matrix
144898
Let $A$ be complex matrix and $x$ be eigenvalue of $A\overline{A}$. Algebraic multiplicity of $x$ is even.
77388
Differentiation operator and eigenvalues
24454
The relationship between the eigenvalues of matrices $XY$ and $YX$
18282
Finding the minimal polynomial, the eigenvalues, and the characteristic polynomial of $T(A)=A+A^t$
153203
Let $4$ and $5$ be the only eigenvalues of $T$. Show $T^2-9T + 20I = 0$ , T is self adjoint.
84535
The spectral radius of normal operator
29022
Linearization of PDE: $0$ is an eigenvalue since all translates of travelling waves are also travelling waves
136643
Continuity of eigenvalues and spectral radius for a general matrix
80022
Eigenvector of A by $A^2$
98656
Geometric multiplicity of the largest eigenvalue
59973
Eigenvalues and power of a matrix