DV and WDVV

of some function F(T). Have been appeared first in the context of topological string theories [1], they were rediscovered later on in much larger class of physical theories where the exact answer for a multidimensional theory could be expressed through a single holomorphic function of several complex variables [2, 3, 4, 5, 6, 7, 8]. Recently, a new example of similar relations between the superpotentials of N = 1 supersymmetric gauge theories in four dimensions and free energies of matrix models in the planar limit was proposed [9, 10]. It has been realized that superpotentials in some N = 1 four-dimensional Yang-Mills theories can be expressed through a single holomorphic function [9] that can be further identified with free energy of the multi-support solutions to matrix models in the planar limit [10]. A natural question which immediately arises in this context is whether these functions – the quasiclassical tau-functions, determined by multi-support solutions to matrix models, satisfy the WDVV equations? In the case of positive answer this is rather important, since multi-support solutions to the matrix models can play