(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 spectralist

Of, pertaining to, or participating in spectralism, a school of musical composition strongly influenced by the spectrographic analysis of sound

A composer of spectralist music

A musical composition practice in which compositional decisions are often informed by the analysis of sound spectra

(mathematics) The intersection of the cone of positive semidefinite matrices with an affine-linear space

plural of spectrahedron

plural of spectral line

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

Vampyrum spectrum, the largest carnivorous bat.