D.5.1.13 normalform

Procedure from library classify.lib (see classify_lib).

Usage:

normalform(s); s=string

Return:

Arnold’s normal form of singularity with name s

Example:

LIB "classify.lib";
ring r=0,(a,b,c),ds;
normalform("E[13]");
→ c2+a3+ab5+b8