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D.6.4.15 modality

Procedure from library classify.lib (see classify_lib).

Usage:
modality(f); f poly

Return:
the modality of the singularity

Example:
 
LIB "classify.lib";
ring r = 0, (x,y,z), ds;
poly f = (x2+3y-2z)^2+xyz-(x-y3+x2z3)^3;
modality(f);
==> 0