Flat pencils of metrics and Frobenius manifolds

Details Flat pencils of metrics and Frobenius manifolds Flat pencils of metrics and Frobenius manifolds

1998-03-23

arxiv.org/abs/math/9803106v1

Mathematics

Differential Geometry

25 pages, no figures, plain TeX

Scientific paper

This paper is based on the author's talk at 1997 Taniguchi Symposium ``Integrable Systems and Algebraic Geometry''. We consider an approach to the theory of Frobenius manifolds based on the geometry of flat pencils of contravariant metrics. It is shown that, under certain homogeneity assumptions, these two objects are identical. The flat pencils of contravariant metrics on a manifold $M$ appear naturally in the classification of bihamiltonian structures of hydrodynamics type on the loop space $L(M)$. This elucidates the relations between Frobenius manifolds and integrable hierarchies.

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