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 call companion(p, x) will return a companion matrix associated with the polynomial p(x).

If C := companion(p, x) and p is  (a monic univariate polynomial) then  (),  (), and  for other values of i and j.

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