Null hypersurface
id:
null-hypersurface-272-13980213
title:
Null hypersurface
text:
In relativity and in pseudo-Riemannian geometry, a null hypersurface is a hypersurface whose normal vector at every point is a null vector. A light cone is an example. An alternative characterization is that the tangent space at every point of a hypersurface contains a nonzero vector such that the metric applied to such a vector and any vector in the tangent space is zero. Another way of saying this is that the pullback of the metric onto the tangent space is degenerate. For a Lorentzian metric,
brand slug:
wiki
category slug:
encyclopedia
description:
original url:
https://en.wikipedia.org/wiki/Null_hypersurface
date created:
date modified:
2022-12-05T15:34:25Z
main entity:
{"identifier":"Q16977871","url":"https://www.wikidata.org/entity/Q16977871"}
image:
fields total:
13
integrity:
13