Abstract
The problem of determination of the flat coordinates for a model of a topological conformal field theory corresponding to the 'twisted' version of an N=2 superconformal Landau-Ginzburg field theory with central charge c=3 is analysed. The model is characterized by a Landau-Ginzburg superpotential of the form: W= 1/4 x4+ 1/4 y4. All possible relevant and marginal perturbations with their corresponding couplings (expressed as functions of the dimensionless flat-coordinate) are added to the above superpotential to give the perturbed topological field theory model. It is seen that the couplings can be completely determined (and hence also the dependence of the perturbations on the flat coordinate) by imposing the conditions of flatness on the space of couplings of the perturbed theory.
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