Phase space representations
83580
What's the point of Hamiltonian mechanics?
133609
orthonormal system in a Hilbert space
56243
Representation under which Pauli matrices transform
14166
Hilbert space of harmonic oscillator: Countable vs uncountable?
32420
A complete orthonormal system contained in a dense sub-space.
96880
How to obtain Hamiltonian formalism and phase space for Lagrangian with second-derivatives?
158876
Computing with matrix differential operators
14203
Finding the creation/annihilation operators
133711
Orthogonal basis for infinite-dimensional vector spaces
153692
Generating and solving recurrence relations
76074
Fourier Series Representation $e^{ax}$
93550
How to find the matrix representation of an operator from its action on a basis?
1048
Discreteness of set of energy eigenvalues
114172
Derivation of Hamilton-Jacobi theory using canonical transformations
154772
The Momentum Operator in QM
55691
Are states of a quantum system represented by vectors in a Hilbert space?
4667
Transformations from n-sphere coordinates to cartesian coordinates.