Self-adjoint
= Self-adjoint
{wiki=Self-adjoint}
In mathematics, particularly in functional analysis and linear algebra, an operator or matrix is termed **self-adjoint** (or **self-adjoint operator**) if it is equal to its own adjoint. The concept of self-adjointness is important in the study of linear operators on Hilbert spaces, as well as in quantum mechanics, where observables are represented by self-adjoint operators. \#\#\# Definitions 1.