Eigenstates of Hermitian Operators
26417
Why do we use Hermitian operators in QM?
59067
How to prove that if the expectation value of $A$ in any state is real, then $A$ is Hermitian?
18939
Eigenvalues of the transpose
49158
Multiplicity of eigenvalues
50948
When Eigenfunctions/Wavefunctions are real?
129977
Prove that $\lambda_1^2$, $\lambda_1\lambda_2$ and $\lambda_2^2$ are eigenvalues of matrix $A$
79486
Does every hermitian operator represent a measurable quantity?
23089
Differences between symmetric, Hermitian, self-adjoint, and essentially self-adjoint operators
52935
Do eigenvectors of quantum operators span the whole Hilbert Space?
37867
If $0$ is the only eigenvalue of a linear operator, is the operator nilpotent
77388
Differentiation operator and eigenvalues
119352
compact and self adjoint square root of an operator
135420
Determining eigenvalues, eigenvectors of $A\in \mathbb{R}^{n\times n}(n\geq 2)$.
55377
Non-zero eigenvalues of $AA^T$ and $A^TA$
84535
The spectral radius of normal operator
59397
Eigenvalues of $AB$ and $BA$ where $A$ and $B$ are square matrices
5058
Eigenvalues of the rank one matrix $uv^T$