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@@ -1,14 +1,48 @@ -Cactus Code Thorn EHFinder -Authors : Peter Diener CVS info : $Header$ + +Cactus Code Thorn EHFinder +Authors : Peter Diener <diener@aei.mpg.de> +Maintainer : Peter Diener <diener@aei.mpg.de> -------------------------------------------------------------------------- Purpose of the thorn: To find the event horizon of a numerical spacetime by integrating a null -surface backwards in time. The basic equation is equation 2 in Anninos et. al, -Physical Review Letters, 74, 630, 1995. +surface backwards in time. The surface will be parametrized as the 0 value isosurface of a level -set function. Hopefully this will work when the topology changes from -one common event horizon to two individual event horizons. +set function. This ensures that it is possible to handle cases when the +topology changes (when evolving backwards in time) from one common event +horizon to two (or more) individual event horizons. + + +Documentation: + +The documentation can be found in the Thorn Guide provided with this +Thorn. For additional details see gr-qc/0305039. + + +History: + +This event horizon finder was written by Peter Diener in 2002-2003. + + +Copyright & Licensing: + +This thorn is copyright (C) 2002-2003 +by Peter Diener <diener@aei.mpg.de>. + +This program is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this thorn (see the file COPYING in this directory); +if not, write to the Free Software Foundation, Inc., 59 Temple +Place, Suite 330, Boston, MA 02111-1307 USA |