A matrix is a set of numbers arranged in rows and columns so as to form a rectangular array. Matrices have wide applications in mathematics, science and economics. The term matrix was introduced by the 19th-century English mathematician Arthur Cayley, who developed the algebraic aspect of matrices.

notes - notation and arithmetic of matrices

worksheet - matrices and groups

review problems sheet - questions 1-9

matrix calculator 1 (including symbolic) - QuickMath

matrix calculator 2 (including symbolic)

Winmat software
Perform matrix arithmetic and solve standard linear algebra problems.

Matrix Algebra - Chapter 3 - Finite Math & Calculus
(includes input-output economic models)

• summary
• true/false quiz
• online tutorial
• review exercises

learning resources and sources of problems

• Introduction to matrices - tutorial from math-ABUNDANCE
• Matrix Algebra - HMC Online Tutorial
• Matrix multiplication and cryptography - Sarah Flannery
• Matrix Reference Manual
• SOS Mathematics - Matrix Algebra