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Monodromy Transform Approach to Solution of Some Field Equations in General Relativity and String Theory  G. A. Alekseev
;  Date: 
11 Nov 1999  Journal:  Proceedings of the workshop "Nonlinearity, Integrability and all that: Twenty years after NEEDS’79", ed. by M.Boiti, L.Martina, F.Pempinelli, B.Prinari & G.Soliani, World Scientific, Singapore (2000), p.p. 12  18  Subject:  General Relativity and Quantum Cosmology; Exactly Solvable and Integrable Systems  grqc hepth nlin.SI solvint  Abstract:  A monodromy transform approach, presented in this communication, provides a general base for solution of spacetime symmetry reductions of Einstein equations in all known integrable cases, which include vacuum, electrovacuum, massless Weyl spinor field and stiff matter fluid, as well as some string theory induced gravity models. It was found a special finite set of functional parameters, defined as the monodromy data for the fundamental solution of associated spectral problem. Similarly to the scattering data in the inverse scattering transform, these monodromy data can be used for characterization of any local solution of the field equations. A "direct" and "inverse" problems of such monodromy transform admit unambiguous solutions. For the linear singular integral equation with a scalar (i.e. nonmatrix) kernel, which solves the inverse problem of this monodromy transform, an equivalent regularization  a Fredholm linear integral equation of the second kind is constrcuted in several convenient forms. For arbitrary choice of the monodromy data a simple iterative method leads to an effective construction of the solution in terms of homogeneously convergent functional series.  Source:  arXiv, grqc/9911045  Services:  Forum  Review  PDF  Favorites 


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