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What is a lapse function

  1. Nov 15, 2011 #1
    Last edited: Nov 15, 2011
  2. jcsd
  3. Nov 17, 2011 #2


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    GR as a 4D geometrical theory involves equations that relate the 4D spacetime metric and matter.

    GR can be reformulated as a 3D theory with time evolution, provided spacetime topology isn't weird. The lapse is a function that appears in the 3+1 version. http://arxiv.org/abs/gr-qc/0703035
    Last edited: Nov 17, 2011
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