Source: wikibot/weyl-von-neumann-theorem
= Weyl–von Neumann theorem
{wiki=Weyl–von_Neumann_theorem}
The Weyl–von Neumann theorem is a result in the theory of linear operators, particularly in the realm of functional analysis and operator theory. It addresses the spectral properties of self-adjoint or symmetric operators in Hilbert spaces. Specifically, the theorem characterizes the absolutely continuous spectrum of a bounded self-adjoint operator.