matrix multiplication

(2.1 hours to learn)


Matrix multiplication is an operator on matrices which satisfies many of the properties of multiplication, although not commutativity.


This concept has the prerequisites:

Core resources (read/watch one of the following)


Khan Academy: Linear Algebra
Other notes:
  • Watch the lecture sequence "Functions and linear transformations" if you're not used to thinking of matrices as linear transformations.
MIT Open Courseware: Linear Algebra (2011)
Videos for an introductory linear algebra course focusing on numerical methods.
Author: Gilbert Strang


Supplemental resources (the following are optional, but you may find them useful)


A First Course in Linear Algebra (2012)
A linear algebra textbook with proofs.
Author: Robert A. Beezer

See also