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D.15.13.45 defineHomogeneous
Procedure from librarymultigrading.lib (see multigrading_lib).
- Usage:
- defineHomogeneous(f[, G]); polynomial f, integer matrix G
- Purpose:
- Yields a matrix which has to be appended to the grading group matrix to make the
polynomial f homogeneous in the grading by grad.
LIB "multigrading.lib"; ring r =0,(x,y,z),dp; intmat grad[2][3] = 1,0,1, 0,1,1; setBaseMultigrading(grad); poly f = x2y3-z5+x-3zx; intmat M = defineHomogeneous(f); M; ==> 3,0,-1, ==> 2,-2,-3 defineHomogeneous(f, grad) == M; ==> 1 isHomogeneous(f); ==> 0 setBaseMultigrading(grad, M); isHomogeneous(f); ==> 1 |