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D.6.9.6 spectrum
Procedure from library gmssing.lib (see gmssing_lib).
- Usage:
- spectrum(t); poly t
- Assume:
- characteristic 0; local degree ordering;
isolated critical point 0 of t
- Return:
| | list sp; singularity spectrum of t
ideal sp[1];
number sp[1][i]; i-th spectral number
intvec sp[2];
int sp[2][i]; multiplicity of i-th spectral number
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Example:
| | LIB "gmssing.lib";
ring R=0,(x,y),ds;
poly t=x5+x2y2+y5;
spprint(spectrum(t));
==> (-1/2,1),(-3/10,2),(-1/10,2),(0,1),(1/10,2),(3/10,2),(1/2,1)
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See also:
spectrum_lib.
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