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Application to Versal Deformations of Singularities
Problem: Determine the strata of constant Tjurina number in the basis of a semiuniversal deformation of the hypersurface singularity given by f

Let m1,...,mr be a monomial basis of the Tjurina algebra
Tlocal(f) = K[x,y]<x,y>/< jacob(f), f >.

A semiuniversal deformation of f is then given by
F=f+t1m1+...+trmr

The relative T1 of F,
is a finitely presentable K[t1,...,tr]-module. The strata of constant Tjurina number are just the flattening strata of this module. SINGULAR code: A3
A3: Interpretation of the result
Adjacencies of simple space curve singularities

Lille, 08-07-02 http://www.singular.uni-kl.de