Self-Adjoint Operators in Stone-Von Neumann Theorem
26417
Why do we use Hermitian operators in QM?
11109
The ideal generated by a non-compact operator
128361
The kernel and range of the powers of a self-adjoint operator
54099
What are the eigenvalues of $\operatorname{ad}x$?
144104
Show that a positive operator on a complex Hilbert space is self-adjoint
121802
Prove that every self-adjoint unitary linear operator can be expressed in the form $U\alpha = \beta - \gamma$
46669
How can I prove these are the adjoint operators?
61810
An application of Borel-Caratheodory theorem
36090
$TT^*=T^2$, show that $T$ is self-adjoint
66299
Operator whose spectrum is given compact set
141907
Haag's theorem and practical QFT computations
97994
Orthogonality Relations Exercise, Brezis' Book Functional Analysis
28719
Question about Angle-Preserving Operators
93062
Is Every Invariant Subspace the Kernel of an polynomial applied in the operator?
52935
Do eigenvectors of quantum operators span the whole Hilbert Space?
136909
Functional Analysis: The rank of an operator detemines if it's a compact operator.
156858
Kernel of powers of a normal operator