New posts in spectral-theory

normal elements in spectral theory.

Examples of type III von Neumann Algebras

Example of a self-adjoint bounded operator on a Hilbert space with empty point spectrum

Spectral measure of the multiplication operator

Spectrum vs eigenvalues

fact used in C*-algebra proofs.

irreducible implies the commutant consists of multiples of identity?

$C^*$-homomorphisms and compact $T_2$ spaces

If matrix $A$ has entries $A_{ij}=\sin(\theta_i - \theta_j)$, why does $\|A\|_* = n$ always hold?

Intuitive understanding of Maximin Principle

Spectrum of the derivative operator

Simultaneous diagonlisation of two quadratic forms, one of which is positive definite

Spectral radius of the Volterra operator

Essential Selfadjointness of Quantum Harmonic Oscillator Hamiltonian

Largest eigenvalue of entry-wise absolute value of a matrix w.r.t. original maximum eigenvalue [duplicate]

What's the connection between the Laplace transform and the Fourier transform?

Example of a Bounded Linear Operator with Unbounded Spectrum.

Why is it important to study the eigenvalues of the Laplacian?

Importance of Toeplitz operators?

Proof of Gelfand formula for spectral radius