Important: The linalg package has been deprecated. Use the superseding packages, LinearAlgebra and VectorCalculus, instead.

- For information on migrating linalg code to the new packages, see examples/LinearAlgebraMigration.

The function orthog returns true if it can show that the matrix A is orthogonal, false if it can show that the matrix is not orthogonal, and FAIL otherwise.

A matrix is orthogonal if the inner product of any column of A with itself is 1, and the inner product of any column of A with any other column is 0.

The Maple function testeq is used to test whether expressions are equivalent to 0 or 1.

The command with(linalg,orthog) allows the use of the abbreviated form of this command.