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D.4.13.2 spectralNeg

Procedure from library zeta.lib (see zeta_lib).

Usage:
spectralNeg(L);
L = list of rings

Assume:
L is output of resolution of singularities

Return:
list of numbers, each a spectral number in (-1,0]

Example:
 
LIB "zeta.lib";
ring R=0,(x,y,z),dp;
ideal I=x3+y4+z5;
list L=resolve(I,"K");
spectralNeg(L);
==> [1]:
==>    -13/60
==> [2]:
==>    -1/60
LIB"gaussman.lib";
ring r=0,(x,y,z),ds;
poly f=x3+y4+z5;
spectrum(f);
==> [1]:
==>    _[1]=-13/60
==>    _[2]=-1/60
==>    _[3]=1/30
==>    _[4]=7/60
==>    _[5]=11/60
==>    _[6]=7/30
==>    _[7]=17/60
==>    _[8]=19/60
==>    _[9]=11/30
==>    _[10]=23/60
==>    _[11]=13/30
==>    _[12]=29/60
==>    _[13]=31/60
==>    _[14]=17/30
==>    _[15]=37/60
==>    _[16]=19/30
==>    _[17]=41/60
==>    _[18]=43/60
==>    _[19]=23/30
==>    _[20]=49/60
==>    _[21]=53/60
==>    _[22]=29/30
==>    _[23]=61/60
==>    _[24]=73/60
==> [2]:
==>    1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1


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