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<meta content="text/html;charset=UTF-8" http-equiv="Content-Type">
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<title>SuperLU: SRC/dcolumn_dfs.c File Reference</title>
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<link href="doxygen.css" rel="stylesheet" type="text/css">
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Main Page
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Data Structures
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Files
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SRC/dcolumn_dfs.c File ReferencePerforms a symbolic factorization. More...
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#include "slu_ddefs.h"
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Defines
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#define T2_SUPER
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What type of supernodes we want.
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Functions
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int dcolumn_dfs (const int m, const int jcol, int *perm_r, int *nseg, int *lsub_col, int *segrep, int *repfnz, int *xprune, int *marker, int *parent, int *xplore, GlobalLU_t *Glu)
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Detailed Description
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-- SuperLU routine (version 3.0) --
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Univ. of California Berkeley, Xerox Palo Alto Research Center,
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and Lawrence Berkeley National Lab.
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October 15, 2003
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Copyright (c) 1994 by Xerox Corporation. All rights reserved.
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THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY
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EXPRESSED OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
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Permission is hereby granted to use or copy this program for any
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purpose, provided the above notices are retained on all copies.
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Permission to modify the code and to distribute modified code is
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granted, provided the above notices are retained, and a notice that
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the code was modified is included with the above copyright notice.
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Define Documentation
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#define T2_SUPER
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Function Documentation
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int dcolumn_dfs
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(
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const int
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m,
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const int
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jcol,
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int *
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perm_r,
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int *
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nseg,
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int *
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lsub_col,
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int *
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segrep,
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int *
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repfnz,
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int *
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xprune,
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int *
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marker,
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int *
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parent,
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int *
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xplore,
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GlobalLU_t *
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Glu
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)
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Purpose
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=======
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DCOLUMN_DFS performs a symbolic factorization on column jcol, and
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decide the supernode boundary.
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This routine does not use numeric values, but only use the RHS
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row indices to start the dfs.
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A supernode representative is the last column of a supernode.
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The nonzeros in U[*,j] are segments that end at supernodal
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representatives. The routine returns a list of such supernodal
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representatives in topological order of the dfs that generates them.
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The location of the first nonzero in each such supernodal segment
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(supernodal entry location) is also returned.
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Local parameters
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================
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nseg: no of segments in current U[*,j]
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jsuper: jsuper=EMPTY if column j does not belong to the same
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supernode as j-1. Otherwise, jsuper=nsuper.
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marker2: A-row --> A-row/col (0/1)
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repfnz: SuperA-col --> PA-row
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parent: SuperA-col --> SuperA-col
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xplore: SuperA-col --> index to L-structure
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Return value
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============
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0 success;
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> 0 number of bytes allocated when run out of space.
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<address style="text-align: right;"><small>Generated on Mon Nov 22 10:23:47 2010 for SuperLU by </small></address>
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 1.5.5
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