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GR: Fachverband Gravitation und Relativitätstheorie

GR 14: Klassische Allgemeine Relativitätstheorie III

GR 14.1: Talk

Friday, April 1, 2011, 08:30–08:50, 20.40: 101

Inversion of hyperelliptic integrals of arbitrary genus with application to particle motion in General Relativity — •Claus Lämmerzahl1, Victor Z. Enolski1,2,3, Eva Hackmann1, Valeria Kagramanova4, and Jutta Kunz41ZARM, Uni Bremen, Germany — 2HWK, Delmenhorst, Germany — 3Institute of Magnetism, Kiev, Ukraine — 4Uni Oldenburg, Germany

The description of many dynamical problems like the particle motion in higher dimensional spherically and axially symmetric space-times is reduced to the inversion of a holomorphic hyperelliptic integral. The result of the inversion is defined only locally, and is done using the algebro-geometric techniques of the standard Jacobi inversion problem and the foregoing restriction to the θ–divisor. For a representation of the hyperelliptic functions the Klein–Weierstraß multivariable sigma function is introduced. It is shown that all parameters needed for the calculations like period matrices and Abelian images of branch points can be expressed in terms of the periods of holomorphic differentials and theta-constants. The cases of genus two and three are considered in detail. The method is exemplified by particle motion associated with a genus three hyperelliptic curve.

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