New posts in hilbert-spaces

Is self-adjointness really a property of an operator, or of an operator and an inner product?

linear-algebra functional-analysis hilbert-spaces linear-transformations

The spectral radius of normal operator

functional-analysis operator-theory hilbert-spaces spectral-theory normal-operator

Generalized Fourier series in $L^2$ that do not converge pointwise a.e.

functional-analysis hilbert-spaces fourier-series

Basic question on dual spaces and adjoint in Hilbert spaces

linear-algebra functional-analysis hilbert-spaces dual-spaces

An infinite series expansion in terms of the polylogarithm function

real-analysis complex-analysis special-functions hilbert-spaces

Surjectivity of the Gauss map in Hilbert spaces

differential-geometry hilbert-spaces

Is the unit sphere in a preHilbert space a total set?

solution-verification hilbert-spaces normed-spaces orthogonality

Are these sequences total sequences?

hilbert-spaces normed-spaces orthogonality

Prove that if $A$ is a normal operator on an complex separable hilbert space $H$ and $A^{3} = A^{4}$ then $A$ is self adjoint

hilbert-spaces spectral-theory normal-operator

Bounded sequence in Hilbert space contains weak convergent subsequence

sequences-and-series functional-analysis hilbert-spaces weak-convergence

Intuition behind the direct integral of a family of Hilbert spaces

functional-analysis measure-theory hilbert-spaces definition intuition

Commuting operators and polar decomposition

operator-theory hilbert-spaces

Quantization of angular momentum: is Dirac's proof wrong?

hilbert-spaces operator-theory spectral-theory quantum-mechanics mathematical-physics

Isomorphic Hilbert spaces

functional-analysis hilbert-spaces abstract-algebra

Can Fourier transform be seen as a decomposition over a basis in a space of tempered distributions

fourier-analysis hilbert-spaces fourier-series distribution-theory

Reproducing Kernel Hilbert Space is dense?

probability functional-analysis stochastic-processes hilbert-spaces

A few questions about the Hilbert triple/Gelfand triple

functional-analysis banach-spaces hilbert-spaces

Definition of resolvent set

functional-analysis operator-theory hilbert-spaces spectral-theory

Nonseparable $L^2$ space built on a sigma finite measure space

general-topology analysis functional-analysis measure-theory hilbert-spaces

Sow that if $\mathcal{H}$ is not finite-dimensional, then there exists a sequence in $B$ that does not have a convergent subsequence.

sequences-and-series hilbert-spaces cauchy-sequences