Flat structures on Frobenius manifolds in the case of irrelevant deformations

In this paper we use a recently suggested conjecture about the integral representation for flat coordinates on Frobenius manifolds, connected with isolated singularities, to compute the flat coordinates and Saito primitive form on the space of deformations of Gepner chiral ring \widehat{{SU}}{(3)}₄. We verify this conjecture comparing the expressions for flat coordinates obtained from the conjecture with the one found by direct computation. The considered case is of a particular interest since apart from the relevant and marginal deformations, it also has an irrelevant one.