Forgot how to multiply matrices? Well, this app can help. It is like a gigantic, well-organized reference card for all things math. Customize your personal reference material by adding your own notes and build up a personalized list of...

There are four fundamental theorems of mathematics: arithmetic, algebra, calculus, and linear algebra listed here. Each one is described on this poster or handout. The challenge for a student of math is to figure out why they are...

Explains how to perform matrix multiplication, including how to perform products on two block matrices. Also has links to related topics.

This site has a good definition and examples of determinants, the site begins by explaining what the value of a determinant is, then gives an example of the determinant of a two by two matrix, a generic formula for finding the...

An excellent site on matrices.

This site gives a definition and examples of a diagonal matrix. The site also contains many links to other related Math World sites.

Find a concise explanation of how to solve systems of linear equations using matrices. An example is given and clearly explained.

Reference material with examples of how to solve system of equations by the matrix method.

Find a concise explanation of the inverse of a matrix. An example is given and clearly explained.

A clear explanation of how to multiply a matrix by a vector and a matrix by a matrix. A follow-up page provides additional examples.

Inverse matrices are very useful for solving matrix equations. But, given a matrix, how do you invert it? How do you find the inverse? The technique for inverting matrices is kind of clever. For a given matrix A and its inverse A-1, we...

From Mathworld.com as site on Maxtricies. Includes formulas, definitions, and links to related articles.

This site explains multiplicative inverse in nonzero real and complex numbers, as well as matrices. Also discusses how to detect the multiplicative inverse of complex numbers in a table.

This tutorial offers formulas and explanations on trigonometric addition formulas and features an easy way to remember the sine and cosine addition formulas using matrices.

This site gives an example of solving a system of equations with the use of Gaussian Elimination.

Math World offers the transformational matrix that allows us to rotate a two dimensional coordinate which in turn rotates the image. The page also offers the transformational matrix for rotation in three dimensions.

This site from MathWorld.com briefly explains what a zero matrix is and contains links to related topics.

This resource gives a brief definition of a square matrix, click on the highlighted terms for more information on matrices.

A graph is a collection of nodes and edges that represents relationships. You can use graphs to model a wide variety of systems. View examples of directed and undirected graphs and how they are constructed in this resource.

This MathWorld site explains the technique for finding the determinant using minors. The site also suggests to use this method only on small matrices, giving a link to Guassian elimination for the alternative(larger matrices.) The site...

This site explains what a minor is relative to matrix manipulations and gives insight on how to use the program "Mathmatica" involving minors.

Come to this site to find the transformational matrix to find the vector rotated 90 degrees from the original. The site also states the special relationship between two perpendicular vectors when using the dot product.

This site, which is provided for by the University of St Andrews, gives a biography of James Sylvester, mathematician. Links to other interesting sites are provided as well.