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Parametric manifolds. I. Extrinsic approach

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https://ir.library.oregonstate.edu/concern/articles/2j62s547z

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  • A parametric manifold can be viewed as the manifold of orbits of a (regular) foliation of a manifold by means of a family of curves. If the foliation is hypersurface orthogonal, the parametric manifold is equivalent to the one‐parameter family of hypersurfaces orthogonal to the curves, each of which inherits a metric and connection from the original manifold via orthogonal projections; this is the well‐known Gauss–Codazzi formalism. This formalism is generalized to the case where the foliation is not hypersurface orthogonal. Crucial to this generalization is the notion of deficiency, which measures the failure of the orthogonal tangent spaces to be surface forming, and which behaves very much like torsion. Some applications to initial value problems in general relativity will be briefly discussed.
  • Keywords: Metrics, Gravitational Fields, Tensor Fields, Mathematical Manifolds, General Relativity Theory, Riemann Space, Vector Fields, Space−Time, Torsion, Differential Geometry, Surfaces
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  • Boersma, S., & Dray, T. (1995, March). Parametric manifolds. I. Extrinsic approach. Journal of Mathematical Physics, 36(3), 1378-1393. doi:10.1063/1.531127
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  • 36
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  • 3
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  • This work was partially funded by NSF Grant No. PHY-9208494. This work forms part of a dissertation submitted to Oregon State University (by S.B.) in partial fulfillment of the requirements for the Ph.D. degree in mathematics.
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