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267 lines
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267 lines
7.3 KiB
HTML
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<B> Next:</B> <A NAME="tex2html14"
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HREF="node1.html">Contents</A>
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<B> <A NAME="tex2html12"
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HREF="node1.html">Contents</A></B>
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<BR>
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<BR>
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<!--End of Navigation Panel-->
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<P>
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MLD2P4 User's and Reference Guidetitle
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<BR>
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<TABLE WIDTH="100%">
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<TR><TD>
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<DIV ALIGN="RIGHT">
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<FONT SIZE="+4"><B>MLD2P4
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<BR>
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<BR>
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User's and Reference Guide
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</B></FONT>
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<BR>
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<BR>
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<BR>
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<BR><I><FONT SIZE="+2">A guide for the Multi-Level Domain Decomposition <BR>
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<BR>
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Parallel Preconditioners Package
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based on PSBLAS</FONT></I>
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</DIV></TD></TR>
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</TABLE>
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<P>
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<BR>
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<TABLE WIDTH="100%">
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<TR><TD>
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<DIV ALIGN="RIGHT">
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<FONT SIZE="+1"><B>Pasqua D'Ambra</B></FONT>
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<BR><FONT SIZE="+1">ICAR-CNR, Naples, Italy
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<BR>
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<BR>
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<BR>
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<BR><FONT SIZE="+1"><B>Daniela di Serafino</B></FONT>
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<BR><FONT SIZE="+1">Second University of Naples, Italy
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<BR>
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<BR>
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<BR>
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<BR><FONT SIZE="+1"><B>Salvatore Filippone</B></FONT>
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<BR><FONT SIZE="+1">University of Rome ``Tor Vergata'', Italy
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</FONT></FONT></FONT></DIV></TD></TR>
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</TABLE>
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<P>
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<BR>
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<TABLE WIDTH="100%">
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<TR><TD>
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<DIV ALIGN="RIGHT">
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<FONT SIZE="+1">Software version: 1.0
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<BR>
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July 22, 2008
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</FONT></DIV></TD></TR>
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</TABLE>
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<P>
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<BR>
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<BR>
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<P>
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<P>
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<H3>Abstract:</H3>
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<DIV>
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MLD2P4 (M<SMALL>ULTI-</SMALL>L<SMALL>EVEL </SMALL>D<SMALL>OMAIN </SMALL>D<SMALL>ECOMPOSITION </SMALL>P<SMALL>ARALLEL </SMALL>P<SMALL>RECONDITIONERS </SMALL>P<SMALL>ACKAGE BASED ON
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</SMALL>PSBLAS) is a package of parallel algebraic multi-level preconditioners.
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It implements various versions of one-level additive and of multi-level additive
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and hybrid Schwarz algorithms. In the multi-level case, a purely algebraic approach
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is applied to generate coarse-level corrections, so that no geometric background is needed
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concerning the matrix to be preconditioned. The matrix is required to be square, real
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or complex, with a symmetric sparsity pattern.
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<P>
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MLD2P4 has been designed to provide scalable and easy-to-use preconditioners in the
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context of the PSBLAS (Parallel Sparse Basic Linear Algebra Subprograms)
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computational framework and can be used in conjuction with the Krylov solvers
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available in this framework. MLD2P4 enables the user to easily specify different aspects
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of a generic algebraic multilevel Schwarz preconditioner, thus allowing to search
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for the ``best'' preconditioner for the problem at hand.
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<P>
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The package has been designed employing object-oriented techniques,
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using Fortran 95, with interfaces to additional third party libraries
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such as UMFPACK, SuperLU and SuperLU_Dist, that
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can be exploited in building multi-level preconditioners. The parallel
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implementation is based on a Single Program Multiple Data (SPMD)
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paradigm for distributed-memory architectures; the inter-process data
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communication is based on MPI and is managed mainly through PSBLAS.
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<P>
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This guide provides a brief description of the functionalities and
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the user interface of MLD2P4.
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</DIV>
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<P>
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<P>
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<BR><HR>
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<!--Table of Child-Links-->
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<A NAME="CHILD_LINKS"></A>
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<UL>
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<LI><A NAME="tex2html15"
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HREF="node1.html">Contents</A>
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<LI><A NAME="tex2html16"
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HREF="node2.html">General Overview</A>
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<LI><A NAME="tex2html17"
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HREF="node3.html">Notational Conventions</A>
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<LI><A NAME="tex2html18"
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HREF="node4.html">Code Distribution</A>
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<LI><A NAME="tex2html19"
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HREF="node5.html">Configuring and Building MLD2P4</A>
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<UL>
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<LI><A NAME="tex2html20"
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HREF="node6.html">Prerequisites</A>
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<LI><A NAME="tex2html21"
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HREF="node7.html">Optional third party libraries</A>
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<LI><A NAME="tex2html22"
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HREF="node8.html">Configuration options</A>
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<LI><A NAME="tex2html23"
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HREF="node9.html">Example and test programs</A>
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</UL>
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<BR>
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<LI><A NAME="tex2html24"
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HREF="node10.html">Multi-level Domain Decomposition Background</A>
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<UL>
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<LI><A NAME="tex2html25"
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HREF="node11.html">Multi-level Schwarz Preconditioners</A>
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<LI><A NAME="tex2html26"
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HREF="node12.html">Smoothed Aggregation</A>
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</UL>
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<BR>
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<LI><A NAME="tex2html27"
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HREF="node13.html">Getting Started</A>
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<UL>
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<LI><A NAME="tex2html28"
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HREF="node14.html">Examples</A>
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</UL>
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<BR>
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<LI><A NAME="tex2html29"
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HREF="node15.html">User Interface</A>
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<UL>
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<LI><A NAME="tex2html30"
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HREF="node16.html">Subroutine mld_precinit</A>
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<UL>
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<LI><A NAME="tex2html31"
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HREF="node17.html">Arguments</A>
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</UL>
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<LI><A NAME="tex2html32"
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HREF="node18.html">Subroutine mld_precset</A>
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<UL>
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<LI><A NAME="tex2html33"
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HREF="node19.html">Arguments</A>
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</UL>
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<LI><A NAME="tex2html34"
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HREF="node20.html">Subroutine mld_precbld</A>
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<UL>
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<LI><A NAME="tex2html35"
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HREF="node21.html">Arguments</A>
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</UL>
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<LI><A NAME="tex2html36"
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HREF="node22.html">Subroutine mld_precaply</A>
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<UL>
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<LI><A NAME="tex2html37"
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HREF="node23.html">Arguments</A>
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</UL>
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<LI><A NAME="tex2html38"
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HREF="node24.html">Subroutine mld_precfree</A>
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<UL>
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<LI><A NAME="tex2html39"
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HREF="node25.html">Arguments</A>
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</UL>
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<LI><A NAME="tex2html40"
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HREF="node26.html">Subroutine mld_precdescr</A>
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<UL>
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<LI><A NAME="tex2html41"
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HREF="node27.html">Arguments</A>
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</UL>
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</UL>
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<BR>
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<LI><A NAME="tex2html42"
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HREF="node28.html">Error Handling</A>
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<LI><A NAME="tex2html43"
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HREF="node29.html">License</A>
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<LI><A NAME="tex2html44"
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HREF="node30.html">Bibliography</A>
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<LI><A NAME="tex2html45"
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HREF="node31.html">About this document ...</A>
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</UL>
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HREF="node1.html">Contents</A>
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<B> <A NAME="tex2html12"
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<ADDRESS>
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Salvatore Filippone
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2008-07-22
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</ADDRESS>
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