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D.6.7.9 vwfilt

Procedure from library gmssing.lib (see gmssing_lib).

Usage:
vwfilt(t); poly t

Assume:
characteristic 0; local degree ordering;
isolated critical point 0 of t

Return:
 
list vw;  weighted V-filtration on H''/s*H''
  ideal vw[1];
    number vw[1][i];  V-filtration index of i-th spectral pair
  intvec vw[2];
    int vw[2][i];  weight filtration index of i-th spectral pair
  intvec vw[3];
    int vw[3][i];  multiplicity of i-th spectral pair
  list vw[4];
    module vw[4][i];  vector space of i-th graded part in terms of vw[5]
  ideal vw[5];  monomial vector space basis of H''/s*H''
  ideal vw[6];  standard basis of Jacobian ideal

Example:
 
See also: spectrum_lib.


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