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D.3.2.20 spnf
Procedure from library linalg.lib (see linalg_lib).
- Usage:
- spnf(list(a[,m])); ideal a, intvec m
- Assume:
- ncols(a)==size(m)
- Return:
- list l:
l[1] an ideal, the generators of a; sorted and with multiple entries displayed only once
l[2] an intvec, l[2][i] provides the multiplicity of l[1][i]
Example:
| | LIB "linalg.lib";
ring R=0,(x,y),ds;
list sp=list(ideal(-1/2,-3/10,-3/10,-1/10,-1/10,0,1/10,1/10,3/10,3/10,1/2));
spprint(spnf(sp));
==> (-1/2,1),(-3/10,2),(-1/10,2),(0,1),(1/10,2),(3/10,2),(1/2,1)
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