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D.6.12.5 StabEqnId

Procedure from library qhmoduli.lib (see qhmoduli_lib).

Usage:
StabEqn(I, w); I ideal, w intvec

Purpose:
compute the equations of the isometry group of the ideal I, each generator of I is fixed by the stabilizer.

Assume:
I semiquasihomogeneous ideal w.r.t. 'w' with an isolated singularity at 0

Return:
list of two rings 'S1', 'S2'
- 'S1' contians the equations of the stabilizer (ideal 'stabid')
- 'S2' contains the action of the stabilizer (ideal 'actionid')

Global:
varSubsList, contains the index j s.t. t(i) -> t(i)t(j) ...

Example:
 


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