Matrices.

Multilinear algebra.

Signal theory (Telecommunication)

Tensor products.

Algebraic geometry > Projective and enumerative geometry > Projective techniques.

Information and communication, circuits > Communication, information > Detection theory.

Information and communication, circuits > Communication, information > Signal theory (characterization, reconstruction, filtering, etc.)

Linear and multilinear algebra; matrix theory > Basic linear algebra > Multilinear algebra, tensor products.

Linear and multilinear algebra; matrix theory > Instructional exposition (textbooks, tutorial papers, etc.)

Statistics > Distribution theory > Characterization and structure theory.