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Geodesic expansion in Mathematica

  1. Sep 17, 2011 #1
    Does anybody knows the package that can, given metric and equation of hypersurface (spacelike or null )calculate induced metric, external curvature and expansion (Raychaudhuri equation) in Mathematica.
  2. jcsd
  3. Sep 17, 2011 #2
    I think that xAct (http://www.xact.es/) can calculate induced metrics and related quantities....
  4. Sep 18, 2011 #3
    I Know that it can calculate induced metrics and external curvatures.
    May be you know how to calculate there normals to hypersurfaces and expansions?
  5. Sep 18, 2011 #4
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