\section{Related Software}
\label{sec:related}

A number of software packages are
closely related to \BS\ and may be of use 
in particular applications.

\begin{itemize}
\item
The software package PETSc \cite{petsc} contains an interface to \BS.
It can be used to access a larger number of iterative solvers,
nonlinear methods, and a large number of other useful features.
Information on PETSc may be obtained on the WWW at
{\tt http://www.mcs.anl.gov/petsc/petsc.html}.
\sindex{PETSc}

\item
The SUMAA3d (Scalable Unstructured Mesh Algorithms and Applications)
project is developing algorithms and software
for many of the tasks associated with unstructured mesh
computation.
Current information about this project can be obtained 
on the WWW at {\tt http://www.mcs.anl.gov/sumaa3d/index.html}.
\sindex{SUMAA3d}

\item
Preliminary adaptive refinement software has been developed
for finite element methods in two and three dimensions \cite{jp:refine}.
This software is part of the SUMAA3d project.
\sindex{adaptive refinement}

%\item
%A preliminary version of a block Lanczos code for the
%symmetric generalized eigenvalue problem has been 
%developed \cite{jp:lanczos}.
%For further information on this package, contact
%the authors by e-mail.

\end{itemize}

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