Important: The polytools package has been deprecated. Use the superseding command PolynomialTools[MinimalPolynomial] instead.

The minpoly function uses the lattice algorithm to find a polynomial of degree n (or less) with small integer coefficients which has the given approximation r of an algebraic number as one of its roots.

The root r may be real or complex.  It may be input as a floating-point approximation to a root or as an exact algebraic number.  In the latter case, it will first be evaluated in floating-point at Digits precision.

If a third argument is specified, then the value  is given the same weight as the coefficients in determining the polynomial. The default value for acc is 10^(Digits-2).