A few documentation fixes.

git-svn-id: http://svn.cactuscode.org/arrangements/CactusNumerical/MoL/trunk@68 578cdeb0-5ea1-4b81-8215-5a3b8777ee0b

1 files changed, 17 insertions, 3 deletions

diff --git a/doc/documentation.tex b/doc/documentation.tex
index 8c3e4e6..56c03a6 100644
--- a/doc/documentation.tex
+++ b/doc/documentation.tex
@@ -231,12 +231,26 @@ defaults to 0, as no scratch space is required for the efficient ICN
 and Runge-Kutta 2 and 3 solvers. For the generic solvers this must be
 at least {\tt MoL\_Intermediate\_Steps - 1}.
 
-A final parameter is {\tt MoL\_Memory\_Always\_On} which switches on
+Another parameter is {\tt MoL\_Memory\_Always\_On} which switches on
 memory for the scratch space always if true and only during evolution
 if false. This defaults to true for speed reasons; the memory gains
 are likely to be limited unless you're doing something very memory
 intensive at initialization or analysis.
 
+There is also a parameter {\tt MoL\_NaN\_Check} that will check your
+RHS grid functions for NaNs using the {\tt NaNChecker} thorn from
+CactusUtils. This will make certain that you find the exact grid
+function computing the first NaN; of course, this may not be the real
+source of your problem.
+
+The parameter {\tt disable\_prolongation} only does anything if you
+are using mesh refinement, and in particular {\tt Carpet}. With mesh
+refinement it may be necessary to disable prolongation in intermediate
+steps of MoL. This occurs when evolving systems containing second
+spatial derivatives. This is done by default in MoL. If your system is
+purely first order in space and time you may wish to set this to {\tt
+  "no"}.
+
 \subsection{Thorn writers}
 \label{AlphaThorns_MoL_sec:writeruse}
 
@@ -1031,12 +1045,12 @@ CCTK_INT ierr = MoLRegisterConstrainedGroup(CCTK_INT ConstrainedIndex)
   \begin{ExampleSection}
     \begin{Example}{C}
 \begin{verbatim}
-ierr = MoLRegisterConstrainedGroup(CCTK_VarIndex("ADMBase::alp"));
+ierr = MoLRegisterConstrainedGroup(CCTK_GroupIndex("ADMBase::lapse"));
 \end{verbatim}
     \end{Example}
     \begin{Example}{Fortran}
 \begin{verbatim}
-call CCTK_GroupIndex(ConstrainedIndex, "ADMBase::alp")
+call CCTK_GroupIndex(ConstrainedIndex, "ADMBase::lapse")
 ierr = MoLRegisterConstrainedGroup(ConstrainedIndex)
 \end{verbatim}
     \end{Example}