mld2p4-2:

docs/html/node18.html
 docs/html/node26.html
 docs/mld2p4-2.0-guide.pdf
 docs/src/userinterface.tex

Doc fixes for precset

docs/src/userinterface.tex

@@ -72,23 +72,34 @@ according to the preconditioner type chosen by the user.
 \subsection{Subroutine mld\_precset\label{sec:precset}}
 
 \begin{center}
-\verb|mld_precset(p,what,val,info)|\\
-\verb|p%set(what,val,info [,ilev])|\\
-\verb|mld_precset(p,smoother,info)|\\
-\verb|p%set(smoother,info [,ilev])|\\
-\verb|mld_precset(p,solver,info)|\\
-\verb|p%set(solver,info [,ilev])|
+\verb|call mld_precset(p,what,val,info)|
 \end{center}
 
 \noindent
 This routine sets the parameters defining the preconditioner. More
 precisely, the parameter identified by \verb|what| is assigned the value
-contained in \verb|val|. The routine may also be invoked as a method
-of the preconditioner object; in this case it is also possible to
-specify an optional \verb|ilev| argument that restricts the effect of
+contained in \verb|val|. 
+
+The routine may also be invoked as a method
+of the preconditioner object as in the following:
+\begin{center}
+\verb|call p%set(what,val,info [,ilev])|\\
+\end{center}
+In this case it is also possible to specify an optional \verb|ilev|
+argument that restricts the effect of 
 the call to the specified level.
-The alternative  forms of this routine are designed to allow
-extensions of the library. 
+
+Finally, if the user has developed  a new type of smoother and/or
+solver by extending one of the base MLD2P4 types, and has declared a
+variable of the new  type in the main program, it is possible to pass
+the new smoother/solver variable  to the setup routine as follows:
+\begin{center}
+\verb|call p%set(smoother,info [,ilev])|\\
+\verb|call p%set(solver,info [,ilev])|
+\end{center}
+In this way, the variable will act as a \emph{mold} to which the
+preconditioner will conform, even though the MLD2P4 library is not
+modified, and thus has no direct knowledge about the new type. 
 
 {\vskip2\baselineskip\noindent\large\bfseries Arguments}