A simple diagram, equivalent to an adjacency matrix in graph theory, used to model the structure of complex systems or projects.

(mathematics) A special skew-symmetric 4×4 matrix that characterizes a straight line in projective space, and is defined by six Plücker coordinates with four degrees of freedom.

(algebra) Generically, the arithmetic of matrices, involving matrix addition, scalar multiplication of matrices, matrix multiplication, and matrix inversion.

(physics) Abbreviation of scattering matrix.

plural of S-matrix

(grammar) A clause that has another (subordinate) clause embedded within it.

plural of matrix clause

(linear algebra) A zero matrix.

plural of null matrix

plural of unitary matrix