Lorentz surface
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In mathematics, a Lorentz surface is a two-dimensional oriented smooth manifold with a conformal equivalence class of Lorentzian metrics. It is the analogue of a Riemann surface in indefinite signature.
Further reading
- Smyth, Robert W. (March 2002), (PDF), Proceedings of the American Mathematical Society, 130 (3): 841–847, doi:
- Weinstein, Tilla (July 1996), An introduction to Lorentz surfaces, De Gruyter Expositions in Mathematics, vol. 22, Walter de Gruyter, ISBN 978-3-11-014333-1