REPROOT

Purpose:

Checks for repeated roots of a polynomial.

Syntax:

REPROOT(p, findroots, tol)

A series, the coefficients of the polynomial in descending powers (highest order to lowest). If findroots is 0, p represents the roots of the polynomial.

findroots

Optional. An integer, the form of input series p:

0:	p contains the polynomial roots
1:	p contains the polynomial coefficients and the roots are computed (default)

tol

Optional. A real, the tolerance threshold to determine repeated roots. Defaults to 1e-3.

Returns:

An integer. 1 if repeated roots exist else 0.

Example:

reproot({1, 3, 3, 1})

returns 1, indicating the polynomial has multiple roots.

Example:

reproot(poly({1, 1, 2}))

returns 1, indicating the polynomial has multiple roots.

Remarks:

REPROOT is a support routine used by RESIDUE and RESIDUEZ.

REPROOT

Purpose:

Syntax:

Returns:

Example:

Example:

Remarks:

See Also: