Why are there no operators in classical mechanics?
126303
Are there linear operators and vector spaces in classical physics?
43127
Why are Hamiltonian Mechanics well-defined?
157321
Why does the action have to be hermitian?
44843
What is the difference between $|0\rangle $ and $0$?
52935
Do eigenvectors of quantum operators span the whole Hilbert Space?
65478
Operational definitions in Newtonian Physics
90818
Can't Prove formula from Sakurai's Modern QM @ Perturbation Theory
29340
Why does no physical energy-momentum tensor exist for the gravitational field?
4095
How do we know that there isn't a classical solution to the measurement problem/Quantum Mechanical uncertainty?
26125
Does the canonical commutation relation fix the form of the momentum operator?
61142
Is there any physics that cannot be expressed in terms of Lagrange equations?
46450
Physical meaning of quantum operators
151039
Why are there no elementary charged, spin-zero particles?
69481
Classical limit of the path integral formulation of quantum mechanics
58122
QM without complex numbers
125172
Why can't I define both implicit and explicit operators?
38723
Can Poincare representations be embedded in non-standard Lorentz representations?