2007/11/07 by K. Nakamura, Kouji Nakamura, Nakamura, Kouji · 1 citation
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paper · pdf · doi:10.48550/arxiv.0711.0996
4 pages, lt7-proc.cls, Prepared for the proceeding of the 7th internaltional conference on "Lie Theory and Its Application in Physics" 18-24 June 2007, Varna, Bulgaria
arxiv created 2007/11/07 · openalex publication_date 2007/11/07 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
As in the case of the other gauge field theories, there is so called ``gauge'' also in general relativity. This ``gauge'' is unphysical degree of freedom. There are two kinds of ``gauges'' in general relativity. These are called the first- and the second-kind of gauges, respectively. The gauge of the first kind is just coordinate system on a single manifold. On the other hand, the gauge of the second kind arises in the general relativistic perturbations. Through the precise distinction of these two concepts of ``gauges'', we develop second-order gauge-invariant general relativistic perturbation theory.