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##

Addition of two polynomials

The following procedures enable to add polynomials with real,interval
or integer coefficients:

VECTOR Add_Polynomial_Interval(int n1,VECTOR &Coeff1,int n2,VECTOR &Coeff2);
INTERVAL_VECTOR Add_Polynomial_Interval(int n1,INTERVAL_VECTOR &Coeff1,
int n2,INTERVAL_VECTOR &Coeff2);
INTEGER_VECTOR Add_Polynomial_Interval(int n1,INTEGER_VECTOR &Coeff1,
int n2,INTEGER_VECTOR &Coeff2);

with:
`ni`: degree of the polynomial
`Coeffi`: the coefficients of the polynomials in increasing
degree

There is also a version which take into account rounding errors:
INTERVAL_VECTOR Add_Polynomial_Safe_Interval(int n1,VECTOR &Coeff1,int n2,VECTOR &Coeff2);

Jean-Pierre Merlet
2012-12-20