int Sign_Polynomial_Interval(int Degree,VECTOR &Coeff,REAL P) int Sign_Polynomial_Interval(int Degree,INTERVAL_VECTOR &Coeff,REAL P) int Sign_Polynomial_Interval(int Degree,INTERVAL_VECTOR &Coeff,REAL P) int Sign_Polynomial_Interval(int Degree,INTERVAL_VECTOR &Coeff,INTERVAL P)with:

`Degree`: degree of the polynomial`Coeff`: the`Degree+1`coefficients (which can be`REAL`or`INTERVAL`of the polynomial in increasing degree`P`: the point or interval at which we want to compute the polynomial

This procedure returns 1 if the polynomial is positive, -1 if it is
negative, 0 if it is 0 and 2 if the sign is either affected by
numerical errors (if `Coeff` and `P` are
`REAL`) or is not constant (if
`Coeff` or `P` are `INTERVAL_VECTOR`).

Jean-Pierre Merlet 2012-12-20