(mathematics) a theorem providing conditions under which an operator or matrix can be diagonalized

Vampyrum spectrum, the largest carnivorous bat.

plural of spectral theory

(mathematics) Those theories extending the eigenvalue and eigenvector theory of a single square matrix to a much broader theory of the structure of operators in a variety of mathematical spaces.

plural of spectral type

plural of spectral class

plural of spectral bat

plural of spectral theorem

(physics) Any of several series of spectral lines of hydrogen that correspond to quantum transitions between the various allowed energy levels of the hydrogen atom.