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Synthetic Differential Geometry: A Way to Intuitionistic Models of General Relativity in Toposes | | Y.B.Grinkevich
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6 Aug 1996 | | Subject: | gr-qc | | Affiliation: | Omsk State University, Russia | | Abstract: | W.Lawvere suggested a approach to differential geometry and to others mathematical disciplines closed to physics, which allows to give definitions of derivatives, tangent vectors and tangent bundles without passages to the limits. This approach is based on a idea of consideration of all settings not in sets but in some cartesian closed category E, particular in some elementary topos. The synthetic differential geometry (SDG) is the theory developed by A.Kock in a context of Lawvere’s ideas. In a base of the theory is an assumption of that a geometric line is not a filed of real numbers, but a some nondegenerate commutative ring R of a line type in E. In this work we shall show that SDG allows to develop a Riemannian geometry and write the Einstein’s equations of a field on pseudo-Riemannian formal manifold. This give a way for constructing a intuitionistic models of general relativity in suitable toposes. | | Source: | arXiv, gr-qc/9608013 | | Services: | Forum | Review | PDF | Favorites | |
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