plural of spectrahedron

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

plural of spectral line

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

Vampyrum spectrum, the largest carnivorous bat.

(uncountable) The quality of being spectral or ghostly. / (countable) Something spectral; a ghost, a spectre.

(mathematics) Of or pertaining to a spectrahedron.

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.

(biochemistry) Any of a group of exceptionally long, intracellular proteins that have the rare ability to bind to all three cytoskeletal elements: actin, microtubules, and intermediate filaments