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D.6.13.7 sppairs
Procedure from library gmssing.lib (see gmssing_lib).
- Usage:
- sppairs(t); poly t
- Assume:
- characteristic 0; local degree ordering;
isolated critical point 0 of t
- Return:
| | list spp; spectral pairs of t
ideal spp[1];
number spp[1][i]; V-filtration index of i-th spectral pair
intvec spp[2];
int spp[2][i]; weight filtration index of i-th spectral pair
intvec spp[3];
int spp[3][i]; multiplicity of i-th spectral pair
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Example:
| | LIB "gmssing.lib";
ring R=0,(x,y),ds;
poly t=x5+x2y2+y5;
sppprint(sppairs(t));
==> ((-1/2,2),1),((-3/10,1),2),((-1/10,1),2),((0,1),1),((1/10,1),2),((3/10,1)\
,2),((1/2,0),1)
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See also:
spectrum_lib.
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