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D.15.1.4 newtonPolygon
Procedure from libraryarnold.lib (see arnold_lib).
- Usage:
- newtonPolygon(f); poly f
- Return:
- a list with an entry for each of the finite facets of f; each entry consists out of a list with first entry the normal vector of the corresponding facet and second entry
a list containing the coordinates of the vertices of the corresponding facet
LIB "arnold.lib"; ring R=0,(x,y),ds; poly f = x^9+x^2*y^4+y^2*x^4+y^8; newtonPolygon(f); ==> [1]: ==> [1]: ==> 2,1 ==> [2]: ==> [1]: ==> 0,8 ==> [2]: ==> 2,4 ==> [2]: ==> [1]: ==> 1,1 ==> [2]: ==> [1]: ==> 2,4 ==> [2]: ==> 4,2 ==> [3]: ==> [1]: ==> 2,5 ==> [2]: ==> [1]: ==> 4,2 ==> [2]: ==> 9,0 |