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D.6.14.5 discr

Procedure from library spcurve.lib (see spcurve_lib).

Usage:
discr(sem,n); sem ideal, n integer

Assume:
sem is the versal deformation of an ideal of codimension 2.
The first n variables of the ring are treated as variables all the others as parameters.

Return:
ideal describing the discriminant

Note:
This is not a powerful algorithm!

Example:
 


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            User manual for Singular version 3-1-6, Dec 2012, generated by texi2html.