Covariance of WDVV equations
Abstract
The (generalized) WDVV equations for the prepotentials in 2d topological and 4,5d Seiberg-Witten models are covariant with respect to non-linear transformations, described in terms of solutions of associated linear problem. Both time-variables and the prepotential change non-trivially, but period matrix (prepotential's second derivatives) remains intact.
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