We classify rational solutions to the WDVV in dim=6 having in mind
certain class of 6-dimensional Frobenius manifolds. The classification
is reduced to the 3-dim Frobenius manifolds that are proved to
reconstruct all 6-dim ones.
The 3-dim case is classified via the analysis of the solutions to Chazy
differential equation with the final conditions written in the language
of elliptic curves and modular forms.
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