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- W1489393736 abstract "Motivated by the theory of integrable PDEs of hydrodynamic type and by the generalization of Dubrovin’s duality in the framework of F-manifolds due to Manin (2005) [7], we consider a special class of F-manifolds, called bi-flat F-manifolds. A bi-flat F-manifold is given by the following data (M,∇1,∇2,∘,∗,e,E), where (M,∘) is an F-manifold, e is the identity of the product ∘, ∇1 is a flat connection compatible with ∘ and satisfying ∇1e=0, while E is an eventual identity giving rise to the dual product ∗, and ∇2 is a flat connection compatible with ∗ and satisfying ∇2E=0. Moreover, the two connections ∇1 and ∇2 are required to be hydrodynamically almost equivalent in the sense specified by Arsie and Lorenzoni (2012) [6]. First we show, similarly to the way in which Frobenius manifolds are constructed starting from Darboux–Egorov systems, that also bi-flat F-manifolds can be built from solutions of suitably augmented Darboux–Egorov systems, essentially dropping the requirement that the rotation coefficients are symmetric. Although any Frobenius manifold automatically possesses the structure of a bi-flat F-manifold, we show that the latter is a strictly larger class. In particular we study in some detail bi-flat F-manifolds in dimensions n=2,3. For instance, we show that in dimension three bi-flat F-manifolds can be obtained by solutions of a two parameter Painlevé VI equation, admitting among its solutions hypergeometric functions. Finally we comment on some open problems of wide scope related to bi-flat F-manifolds." @default.
- W1489393736 created "2016-06-24" @default.
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- W1489393736 date "2013-08-01" @default.
- W1489393736 modified "2023-09-23" @default.
- W1489393736 title "From the Darboux–Egorov system to bi-flat <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML altimg=si1.gif display=inline overflow=scroll><mml:mi>F</mml:mi></mml:math>-manifolds" @default.
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- W1489393736 doi "https://doi.org/10.1016/j.geomphys.2013.03.023" @default.
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