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D.2.4.5 pnormalf
Procedure from library grobcov.lib (see grobcov_lib).
- Usage:
- pnormalf(f,E,N);
f: the polynomial to be reduced modulo V(E)\V(N)
of a segment in the parameters.
E: the null conditions ideal
N: the non-null conditions
- Return:
- a reduced polynomial g of f, whose coefficients are reduced
modulo E and having no factor in N.
- Note:
- Should be called from ring Q[a][x].
Ideals E and N must be given by polynomials
in the parameters.
Example:
| LIB "grobcov.lib";
ring R=(0,a,b,c),(x,y),dp;
poly f=(b^2-1)*x^3*y+(c^2-1)*x*y^2+(c^2*b-b)*x+(a-bc)*y;
ideal E=(c-1);
ideal N=a-b;
pnormalf(f,E,N);
==> (b2-1)*x3y+(a-b)*y
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