On the dimensionality of the Hilbert space for a central potential
14166
Hilbert space of harmonic oscillator: Countable vs uncountable?
143157
Perturbation theory: justifying expansion in terms of eigenstates of the basis Hamiltonian
26125
Does the canonical commutation relation fix the form of the momentum operator?
95943
Dimension analysis of an integral
69893
An inner product space and its proper closed subspace with trivial orthogonal complement
37060
The Parallelogram Identity for an inner product space
114317
Cauchy-Schwarz inequality in Shankhar's Quantum Mechanics
17159
Proof of Closest Point Theorem in Hilbert Space
65381
Krull dimension on localization
49759
Proving that $i\hbar\frac{\partial}{\partial \mathbf{p}}$ is the operator of $\mathbf{x}$ in momentum space
140835
Inner Product Space Inequality
24653
Integral in $n-$dimensional euclidean space
50946
Separable Hilbert space have a countable orthonormal basis
114510
Inner Product Spaces
59657
On the nature of the collapse of the wave function
63032
Why is it true that every finite-dimensional inner product space is a Hilbert space?
12212
Showing a certain subspace of Hilbert space is dense