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D.15.1.13 piecewiseJet
Procedure from library arnold.lib (see arnold_lib).
- Usage:
- piecewiseJet(f,w,d); f poly, w a piecewise weight given by a list, which can be computed using @ref(piecewiseWeightOfPolygon), d int
- Return:
- the piecewise d-jet of f, with regard to the weight w
Example:
| | LIB "arnold.lib";
ring R=0,(x,y),ds;
poly f = x^9+x^2*y^4+y^2*x^4+y^8+x^3*y^5+y^2*x^5;
list NP = newtonPolygon(f);
list w = piecewiseWeightOfPolygon(NP);
int d =piecewiseOrd(f,w);
piecewiseJet(f,w,d);
==> x4y2+x2y4+y8+x9
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