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<meta content="text/html;charset=UTF-8" http-equiv="Content-Type">
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<title>SuperLU: SRC/spivotgrowth.c File Reference</title>
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Main Page
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Data Structures
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Files
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SRC/spivotgrowth.c File ReferenceComputes the reciprocal pivot growth factor. More...
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#include <math.h>
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#include "slu_sdefs.h"
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Functions
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float sPivotGrowth (int ncols, SuperMatrix *A, int *perm_c, SuperMatrix *L, SuperMatrix *U)
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Detailed Description
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-- SuperLU routine (version 2.0) --
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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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November 15, 1997
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Function Documentation
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float sPivotGrowth
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(
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int
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ncols,
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SuperMatrix *
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A,
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int *
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perm_c,
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SuperMatrix *
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L,
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SuperMatrix *
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U
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)
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Purpose
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=======
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Compute the reciprocal pivot growth factor of the leading ncols columns
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of the matrix, using the formula:
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min_j ( max_i(abs(A_ij)) / max_i(abs(U_ij)) )
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Arguments
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=========
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ncols (input) int
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The number of columns of matrices A, L and U.
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A (input) SuperMatrix*
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Original matrix A, permuted by columns, of dimension
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(A->nrow, A->ncol). The type of A can be:
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Stype = NC; Dtype = SLU_S; Mtype = GE.
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L (output) SuperMatrix*
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The factor L from the factorization Pr*A=L*U; use compressed row
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subscripts storage for supernodes, i.e., L has type:
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Stype = SC; Dtype = SLU_S; Mtype = TRLU.
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U (output) SuperMatrix*
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The factor U from the factorization Pr*A*Pc=L*U. Use column-wise
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storage scheme, i.e., U has types: Stype = NC;
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Dtype = SLU_S; Mtype = TRU.
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<address style="text-align: right;"><small>Generated on Mon Nov 22 10:23:48 2010 for SuperLU by </small></address>
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 1.5.5
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