Nilpotent orbits of a generalization of Hodge structures

Details Nilpotent orbits of a generalization of Hodge structures Nilpotent orbits of a generalization of Hodge structures

2006-03-23

arxiv.org/abs/math/0603564v4

Mathematics

Algebraic Geometry

43 pages, some very minor modifications, misprints corrected

Scientific paper

We study a generalization of Hodge structures which first appeared in the work of Cecotti and Vafa. It consists of twistors, that is, holomorphic vector bundles on P^1, with additional structure, a flat connection on C^*, a real subbundle and a pairing. We call these objects TERP-structures. We generalize to TERP-structures a correspondence of Cattani, Kaplan and Schmid between nilpotent orbits of Hodge structures and polarized mixed Hodge structures. The proofs use work of Simpson and Mochizuki on variations of twistor structures and a control of the Stokes structures of the poles at zero and infinity. The results are applied to TERP-structures which arise via oscillating integrals from holomorphic functions with isolated singularities.

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