Split structures in general relativity and the Kaluza-Klein theories

Details Split structures in general relativity and the Kaluza-Klein theories Split structures in general relativity and the Kaluza-Klein theories

1998-04-20

arxiv.org/abs/gr-qc/9804043v2

J.Math.Phys.40:955-979,1999

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

30 pages, RevTeX, aps.sty, some additions and corrections, new references added

Scientific paper

10.1063/1.532697

We construct a general approach to decomposition of the tangent bundle of pseudo-Riemannian manifolds into direct sums of subbundles, and the associated decomposition of geometric objects. An invariant structure {\cal H}^r defined as a set of r projection operators is used to induce decomposition of the geometric objects into those of the corresponding subbundles. We define the main geometric objects characterizing decomposition. Invariant non-holonomic generalizations of the Gauss-Codazzi-Ricci's relations have been obtained. All the known types of decomposition (used in the theory of frames of reference, in the Hamiltonian formulation for gravity, in the Cauchy problem, in the theory of stationary spaces, and so on) follow from the present work as special cases when fixing a basis and dimensions of subbundles, and parameterization of a basis of decomposition. Various methods of decomposition have been applied here for the Unified Multidimensional Kaluza-Klein Theory and for relativistic configurations of a perfect fluid. Discussing an invariant form of the equations of motion we have found the invariant equilibrium conditions and their 3+1 decomposed form. The formulation of the conservation law for the curl has been obtained in the invariant form.

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