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414 lines
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* revised and updated by: Marcus Hennecke, Ross Moore, Herb Swan
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* with significant contributions from:
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<IMG WIDTH="65" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="contents" SRC="contents.png"></A>
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<BR>
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<B> Next:</B> <A NAME="tex2html36"
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HREF="node1.html">Contents</A>
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<B> <A NAME="tex2html34"
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HREF="node1.html">Contents</A></B>
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<BR>
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<!--End of Navigation Panel-->
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language=Fortran
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<P>
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<FONT SIZE="+2"><B>PSBLAS
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<BR>
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<BR>
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User's and Reference
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Guide</B></FONT>
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<BR><I><FONT SIZE="+1">A reference guide for the Parallel Sparse BLAS library</FONT></I>
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<BR>
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<BR>
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<BR>
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<BR><B>Salvatore Filippone
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<BR>
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Alfredo Buttari </B>
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<BR>
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University of Rome ``Tor Vergata'', Italy
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<BR>
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<BR>
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<BR>
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Software version: 3.5.0
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<BR>
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Sep 1st, 2017
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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="tex2html37"
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HREF="node1.html">Contents</A>
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<LI><A NAME="tex2html38"
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HREF="node2.html">Introduction</A>
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<LI><A NAME="tex2html39"
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HREF="node3.html">General overview</A>
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<UL>
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<LI><A NAME="tex2html40"
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HREF="node4.html">Basic Nomenclature</A>
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<LI><A NAME="tex2html41"
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HREF="node5.html">Library contents</A>
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<LI><A NAME="tex2html42"
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HREF="node6.html">Application structure</A>
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<UL>
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<LI><A NAME="tex2html43"
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HREF="node7.html">User-defined index mappings</A>
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</UL>
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<LI><A NAME="tex2html44"
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HREF="node8.html">Programming model</A>
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</UL>
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<BR>
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<LI><A NAME="tex2html45"
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HREF="node9.html">Data Structures and Classes</A>
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<UL>
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<LI><A NAME="tex2html46"
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HREF="node10.html">Descriptor data structure</A>
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<UL>
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<LI><A NAME="tex2html47"
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HREF="node11.html">Descriptor Methods</A>
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<LI><A NAME="tex2html48"
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HREF="node12.html">get_local_rows -- Get number of local rows</A>
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<LI><A NAME="tex2html49"
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HREF="node13.html">get_local_cols -- Get number of local cols</A>
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<LI><A NAME="tex2html50"
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HREF="node14.html">get_global_rows -- Get number of global rows</A>
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<LI><A NAME="tex2html51"
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HREF="node15.html">get_global_cols -- Get number of global cols</A>
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<LI><A NAME="tex2html52"
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HREF="node16.html">get_global_indices -- Get vector of global indices</A>
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<LI><A NAME="tex2html53"
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HREF="node17.html">get_context -- Get communication context</A>
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<LI><A NAME="tex2html54"
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HREF="node18.html">Clone -- clone current object</A>
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<LI><A NAME="tex2html55"
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HREF="node19.html">psb_cd_get_large_threshold -- Get threshold for
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index mapping switch</A>
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<LI><A NAME="tex2html56"
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HREF="node20.html">psb_cd_set_large_threshold -- Set threshold for
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index mapping switch</A>
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<LI><A NAME="tex2html57"
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HREF="node21.html">Named Constants</A>
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</UL>
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<LI><A NAME="tex2html58"
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HREF="node22.html">Sparse Matrix class</A>
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<UL>
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<LI><A NAME="tex2html59"
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HREF="node23.html">Sparse Matrix Methods</A>
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<LI><A NAME="tex2html60"
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HREF="node24.html">get_nrows -- Get number of rows in a sparse matrix</A>
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<LI><A NAME="tex2html61"
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HREF="node25.html">get_ncols -- Get number of columns in a sparse
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matrix</A>
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<LI><A NAME="tex2html62"
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HREF="node26.html">get_nnzeros -- Get number of nonzero elements
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in a sparse matrix</A>
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<LI><A NAME="tex2html63"
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HREF="node27.html">get_size -- Get maximum number of nonzero elements
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in a sparse matrix</A>
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<LI><A NAME="tex2html64"
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HREF="node28.html">sizeof -- Get memory occupation in bytes
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of a sparse matrix</A>
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<LI><A NAME="tex2html65"
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HREF="node29.html">get_fmt -- Short description of the dynamic type</A>
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<LI><A NAME="tex2html66"
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HREF="node30.html">is_bld, is_upd, is_asb -- Status check</A>
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<LI><A NAME="tex2html67"
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HREF="node31.html">is_lower, is_upper, is_triangle, is_unit --
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Format check</A>
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<LI><A NAME="tex2html68"
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HREF="node32.html">cscnv -- Convert to a different storage format</A>
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<LI><A NAME="tex2html69"
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HREF="node33.html">csclip -- Reduce to a submatrix</A>
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<LI><A NAME="tex2html70"
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HREF="node34.html">clean_zeros -- Eliminate zero coefficients</A>
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<LI><A NAME="tex2html71"
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HREF="node35.html">get_diag -- Get main diagonal</A>
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<LI><A NAME="tex2html72"
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HREF="node36.html">clip_diag -- Cut out main diagonal</A>
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<LI><A NAME="tex2html73"
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HREF="node37.html">tril -- Return the lower triangle</A>
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<LI><A NAME="tex2html74"
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HREF="node38.html">triu -- Return the upper triangle</A>
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<LI><A NAME="tex2html75"
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HREF="node39.html">psb_set_mat_default -- Set default storage format</A>
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<LI><A NAME="tex2html76"
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HREF="node40.html">clone -- Clone current object</A>
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<LI><A NAME="tex2html77"
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HREF="node41.html">Named Constants</A>
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</UL>
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<LI><A NAME="tex2html78"
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HREF="node42.html">Dense Vector Data Structure</A>
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<UL>
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<LI><A NAME="tex2html79"
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HREF="node43.html">Vector Methods</A>
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<LI><A NAME="tex2html80"
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HREF="node44.html">get_nrows -- Get number of rows in a dense vector</A>
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<LI><A NAME="tex2html81"
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HREF="node45.html">sizeof -- Get memory occupation in bytes
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of a dense vector</A>
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<LI><A NAME="tex2html82"
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HREF="node46.html">set -- Set contents of the vector</A>
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<LI><A NAME="tex2html83"
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HREF="node47.html">get_vect -- Get a copy of the vector contents</A>
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<LI><A NAME="tex2html84"
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HREF="node48.html">clone -- Clone current object</A>
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</UL>
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<LI><A NAME="tex2html85"
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HREF="node49.html">Preconditioner data structure</A>
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<LI><A NAME="tex2html86"
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HREF="node50.html">Heap data structure</A>
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</UL>
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<BR>
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<LI><A NAME="tex2html87"
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HREF="node51.html">Computational routines</A>
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<UL>
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<LI><A NAME="tex2html88"
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HREF="node52.html">psb_geaxpby -- General Dense Matrix Sum</A>
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<LI><A NAME="tex2html89"
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HREF="node53.html">psb_gedot -- Dot Product</A>
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<LI><A NAME="tex2html90"
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HREF="node54.html">psb_gedots -- Generalized Dot Product</A>
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<LI><A NAME="tex2html91"
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HREF="node55.html">psb_normi -- Infinity-Norm of Vector</A>
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<LI><A NAME="tex2html92"
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HREF="node56.html">psb_geamaxs -- Generalized Infinity Norm</A>
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<LI><A NAME="tex2html93"
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HREF="node57.html">psb_norm1 -- 1-Norm of Vector</A>
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<LI><A NAME="tex2html94"
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HREF="node58.html">psb_geasums -- Generalized 1-Norm of Vector</A>
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<LI><A NAME="tex2html95"
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HREF="node59.html">psb_norm2 -- 2-Norm of Vector</A>
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<LI><A NAME="tex2html96"
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HREF="node60.html">psb_genrm2s -- Generalized 2-Norm of Vector</A>
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<LI><A NAME="tex2html97"
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HREF="node61.html">psb_norm1 -- 1-Norm of Sparse Matrix</A>
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<LI><A NAME="tex2html98"
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HREF="node62.html">psb_normi -- Infinity Norm of Sparse Matrix</A>
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<LI><A NAME="tex2html99"
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HREF="node63.html">psb_spmm -- Sparse Matrix by Dense Matrix
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Product</A>
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<LI><A NAME="tex2html100"
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HREF="node64.html">psb_spsm -- Triangular System Solve</A>
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</UL>
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<BR>
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<LI><A NAME="tex2html101"
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HREF="node65.html">Communication routines</A>
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<UL>
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<LI><A NAME="tex2html102"
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HREF="node66.html">psb_halo -- Halo Data Communication</A>
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<LI><A NAME="tex2html103"
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HREF="node67.html">psb_ovrl -- Overlap Update</A>
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<LI><A NAME="tex2html104"
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HREF="node68.html">psb_gather -- Gather Global Dense Matrix</A>
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<LI><A NAME="tex2html105"
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HREF="node69.html">psb_scatter -- Scatter Global Dense Matrix</A>
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</UL>
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<BR>
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<LI><A NAME="tex2html106"
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HREF="node70.html">Data management routines</A>
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<UL>
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<LI><A NAME="tex2html107"
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HREF="node71.html">psb_cdall -- Allocates a communication descriptor</A>
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<LI><A NAME="tex2html108"
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HREF="node72.html">psb_cdins -- Communication descriptor insert
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routine</A>
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<LI><A NAME="tex2html109"
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HREF="node73.html">psb_cdasb -- Communication descriptor assembly
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routine</A>
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<LI><A NAME="tex2html110"
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HREF="node74.html">psb_cdcpy -- Copies a communication descriptor</A>
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<LI><A NAME="tex2html111"
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HREF="node75.html">psb_cdfree -- Frees a communication descriptor</A>
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<LI><A NAME="tex2html112"
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HREF="node76.html">psb_cdbldext -- Build an extended communication
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descriptor</A>
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<LI><A NAME="tex2html113"
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HREF="node77.html">psb_spall -- Allocates a sparse matrix</A>
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<LI><A NAME="tex2html114"
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HREF="node78.html">psb_spins -- Insert a cloud of elements into a sparse
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matrix</A>
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<LI><A NAME="tex2html115"
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HREF="node79.html">psb_spasb -- Sparse matrix assembly routine</A>
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<LI><A NAME="tex2html116"
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HREF="node80.html">psb_spfree -- Frees a sparse matrix</A>
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<LI><A NAME="tex2html117"
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HREF="node81.html">psb_sprn -- Reinit sparse matrix structure for psblas
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routines.</A>
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<LI><A NAME="tex2html118"
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HREF="node82.html">psb_geall -- Allocates a dense matrix</A>
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<LI><A NAME="tex2html119"
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HREF="node83.html">psb_geins -- Dense matrix insertion routine</A>
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<LI><A NAME="tex2html120"
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HREF="node84.html">psb_geasb -- Assembly a dense matrix</A>
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<LI><A NAME="tex2html121"
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HREF="node85.html">psb_gefree -- Frees a dense matrix</A>
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<LI><A NAME="tex2html122"
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HREF="node86.html">psb_gelp -- Applies a left permutation to a dense
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matrix</A>
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<LI><A NAME="tex2html123"
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HREF="node87.html">psb_glob_to_loc -- Global to local indices
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convertion</A>
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<LI><A NAME="tex2html124"
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HREF="node88.html">psb_loc_to_glob -- Local to global indices
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conversion</A>
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<LI><A NAME="tex2html125"
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HREF="node89.html">psb_is_owned -- </A>
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<LI><A NAME="tex2html126"
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HREF="node90.html">psb_owned_index -- </A>
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<LI><A NAME="tex2html127"
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HREF="node91.html">psb_is_local -- </A>
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<LI><A NAME="tex2html128"
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HREF="node92.html">psb_local_index -- </A>
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<LI><A NAME="tex2html129"
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HREF="node93.html">psb_get_boundary -- Extract list of boundary
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elements</A>
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<LI><A NAME="tex2html130"
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HREF="node94.html">psb_get_overlap -- Extract list of overlap
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elements</A>
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<LI><A NAME="tex2html131"
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HREF="node95.html">psb_sp_getrow -- Extract row(s) from a sparse
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matrix</A>
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<LI><A NAME="tex2html132"
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HREF="node96.html">psb_sizeof -- Memory occupation</A>
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<LI><A NAME="tex2html133"
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HREF="node97.html">Sorting utilities -- </A>
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</UL>
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<BR>
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<LI><A NAME="tex2html134"
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HREF="node98.html">Parallel environment routines</A>
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<UL>
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<LI><A NAME="tex2html135"
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HREF="node99.html">psb_init -- Initializes PSBLAS parallel
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environment</A>
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<LI><A NAME="tex2html136"
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HREF="node100.html">psb_info -- Return information about PSBLAS parallel
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environment</A>
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<LI><A NAME="tex2html137"
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HREF="node101.html">psb_exit -- Exit from PSBLAS parallel
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environment</A>
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<LI><A NAME="tex2html138"
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HREF="node102.html">psb_get_mpicomm -- Get the MPI communicator</A>
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<LI><A NAME="tex2html139"
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HREF="node103.html">psb_get_rank -- Get the MPI rank</A>
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<LI><A NAME="tex2html140"
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HREF="node104.html">psb_wtime -- Wall clock timing</A>
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<LI><A NAME="tex2html141"
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HREF="node105.html">psb_barrier -- Sinchronization point parallel
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environment</A>
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<LI><A NAME="tex2html142"
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HREF="node106.html">psb_abort -- Abort a computation</A>
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<LI><A NAME="tex2html143"
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HREF="node107.html">psb_bcast -- Broadcast data</A>
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<LI><A NAME="tex2html144"
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HREF="node108.html">psb_sum -- Global sum</A>
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<LI><A NAME="tex2html145"
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HREF="node109.html">psb_max -- Global maximum</A>
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<LI><A NAME="tex2html146"
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HREF="node110.html">psb_min -- Global minimum</A>
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<LI><A NAME="tex2html147"
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HREF="node111.html">psb_amx -- Global maximum absolute value</A>
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<LI><A NAME="tex2html148"
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HREF="node112.html">psb_amn -- Global minimum absolute value</A>
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<LI><A NAME="tex2html149"
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HREF="node113.html">psb_snd -- Send data</A>
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<LI><A NAME="tex2html150"
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HREF="node114.html">psb_rcv -- Receive data</A>
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</UL>
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<BR>
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<LI><A NAME="tex2html151"
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HREF="node115.html">Error handling</A>
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<LI><A NAME="tex2html152"
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HREF="node116.html">Utilities</A>
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<UL>
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<LI><A NAME="tex2html153"
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HREF="node117.html">hb_read -- Read a sparse matrix from a file in the
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Harwell-Boeing format</A>
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<LI><A NAME="tex2html154"
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HREF="node118.html">hb_write -- Write a sparse matrix to a file
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in the Harwell-Boeing format</A>
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<LI><A NAME="tex2html155"
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HREF="node119.html">mm_mat_read -- Read a sparse matrix from a
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file in the MatrixMarket format</A>
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<LI><A NAME="tex2html156"
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HREF="node120.html">mm_array_read -- Read a dense array from a
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file in the MatrixMarket format</A>
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<LI><A NAME="tex2html157"
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HREF="node121.html">mm_mat_write -- Write a sparse matrix to a
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file in the MatrixMarket format</A>
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<LI><A NAME="tex2html158"
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HREF="node122.html">mm_array_write -- Write a dense array from a
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file in the MatrixMarket format</A>
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</UL>
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<BR>
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<LI><A NAME="tex2html159"
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HREF="node123.html">Preconditioner routines</A>
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<UL>
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<LI><A NAME="tex2html160"
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HREF="node124.html">init -- Initialize a preconditioner</A>
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<LI><A NAME="tex2html161"
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HREF="node125.html">build -- Builds a preconditioner</A>
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<LI><A NAME="tex2html162"
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HREF="node126.html">apply -- Preconditioner application
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routine</A>
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<LI><A NAME="tex2html163"
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HREF="node127.html">descr -- Prints a description of current
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preconditioner</A>
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<LI><A NAME="tex2html164"
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HREF="node128.html">clone -- clone current
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preconditioner</A>
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<LI><A NAME="tex2html165"
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HREF="node129.html">free -- Free a preconditioner</A>
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</UL>
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<BR>
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<LI><A NAME="tex2html166"
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HREF="node130.html">Iterative Methods</A>
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<UL>
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<LI><A NAME="tex2html167"
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HREF="node131.html">psb_krylov -- Krylov Methods Driver
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Routine</A>
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</UL>
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<BR>
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<LI><A NAME="tex2html168"
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