My Matrix Inverse Calculator

This calculates the inverse of arbitrary-sized square matrices, by recursively computing the matrix of minors and applying the grid of signs to form the matrix of cofactors. It then transposes the matrix of cofactors to calculate the adjugate matrix, before multiplying by the reciprocal of the determinant, to get the inverse. Some of the uses of inversing matrices include reversing linear transformations and solving linear systems of equations.

The calculator accepts both integers and rational numbers in the form a/b. The source code is written in JavaScript, and because JavaScript does not have a native implementation of rational numbers (alas!), I had to write my own. You can use tabs for fast data entry.