(mathematics) A process by which a matrix (a rectangular table of numbers or abstract quantities that can be added and multiplied) is broken down into simpler numerical building blocks.

(physics) The original formulation of quantum mechanics in which the operators were represented by time-dependent matrices.

(biology) The material within the space, enclosed by the mitochondrial inner membrane. It is composed of enzymes, DNA filaments, granules, protein crystals, glycogen, and lipid.

(mathematics) A matrix whose entries are all zero.

(linear algebra) A square matrix A with complex entries that is equal to its own conjugate transpose, i.e., such that A=A^†.

plural of identity matrix

(linear algebra) A matrix which when multiplied by its conjugate transpose yields the identity matrix.

(linear algebra) A square matrix which is not invertible.

(physics) Abbreviation of Cabibbo-Kobayashi-Maskawa matrix.

A type of organizational management in which people with similar skills are pooled for work assignments and may have more than one manager.