Communications in Mathematical Physics

, Volume 9, Issue 4, pp 313–326

Conformal tensor discontinuities in general relativity

Authors

  • L. C. Shepley
    • University of Texas
Article

DOI: 10.1007/BF01654285

Cite this article as:
Shepley, L.C. Commun.Math. Phys. (1968) 9: 313. doi:10.1007/BF01654285

Abstract

The postulate is made that across a given hypersurfaceN the metric and its first derivatives are continuous. This postulate is used to derive conditions which must be satisfied by discontinuities in the Riemann tensor acrossN. These conditions imply that the conformal tensor jump is uniquely determined by the stress-energy tensor discontinuity ifN is non-null (and to within an additive term of type Null ifN is lightlike). Alternatively,\([C^{\alpha \beta } _{\gamma \delta } ]\) and [R] determine\(\left[ {R_{\mu v} - \frac{1}{4}Rg_{\mu v} } \right]\) ifN is non-null. These relationships between the conformal tensor and stress-energy tensor jumps are given explicitly in terms of a three-dimensional complex representation of the antisymmetric tensors. Application of these results to perfect-fluid discontinuities is made:\([C^{\alpha \beta } _{\gamma \delta } ]\) is of type D across a fluid-vacuum boundary and across an internal, non-null shock front.\([C^{\alpha \beta } _{\gamma \delta } ]\) is of type I (non-degenerate) in general across fluid interfaces across which no matter flows, except for special cases.

Copyright information

© Springer-Verlag 1968