New posts in Spectral Theory

An algebra with a strictly positive state + condition ? to become a C$^*$-algebra.

Spectral decomposition of $-\Delta$ the Laplacian

Intuition on spectral theorem

Spectrum of operator on $L^2([0,1])$

Spectrum vs eigenvalues

Extending the spectral theorem for bounded self adjoint operators to bounded normal operators

Is the limit of the spectral radius the spectral radius of the limit?

Why is the magnetic Schrödinger operator positive?

Dimensionality in quantum mechanics

A hole in the distribution of eigenvalues - is this real?