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D.7.1.1 degreepart
Procedure from library presolve.lib (see presolve_lib).
- Usage:
degreepart(id,d1,d2[,v]); id=ideal/module, d1,d1=integers, v=intvec
- Return:
generators of id of [v-weighted] total degree >= d1 and <= d2 (default: v = 1,...,1)
Example:
LIB "presolve.lib"; ring r=0,(x,y,z),dp; ideal i=1+x+x2+x3+x4,3,xz+y3+z8; degreepart(i,0,4); → _[1]=x4+x3+x2+x+1 → _[2]=3 module m=[x,y,z],x*[x3,y2,z],[1,x2,z3,0,1]; intvec v=2,3,6; show(degreepart(m,8,8,v)); → // module, 1 generator(s) → [x4,xy2,xz] |