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Journal Article

Foundations of Gravitational Lens Theory

MPS-Authors

Ehlers,  Jürgen
Geometric Analysis and Gravitation, AEI-Golm, MPI for Gravitational Physics, Max Planck Society;

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3374.pdf
(Publisher version), 214KB

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Citation

Ehlers, J. (2000). Foundations of Gravitational Lens Theory. Annalen der Physik, 9, 307-330.


Cite as: https://hdl.handle.net/11858/00-001M-0000-0013-578A-F
Abstract
The main concepts of gravitational lens theory are introduced on the basis of spacetime geometry without assuming approximations. The singularities of light cones, in particular their caustics, are reviewed as examples of singularities of Lagrangian resp. Legendrian maps. It is indicated how the usual approximate lens theory may be derived from the general framework.