Home Man
Search
Today's Posts
Register

Linux & Unix Commands - Search Man Pages

CentOS 7.0 - man page for sgetrf (centos section 3)

sgetrf.f(3)				      LAPACK				      sgetrf.f(3)

NAME
       sgetrf.f -

SYNOPSIS
   Functions/Subroutines
       subroutine sgetrf (M, N, A, LDA, IPIV, INFO)
	   SGETRF

Function/Subroutine Documentation
   subroutine sgetrf (integerM, integerN, real, dimension( lda, * )A, integerLDA, integer,
       dimension( * )IPIV, integerINFO)
       SGETRF

       Purpose:

	    SGETRF computes an LU factorization of a general M-by-N matrix A
	    using partial pivoting with row interchanges.

	    The factorization has the form
	       A = P * L * U
	    where P is a permutation matrix, L is lower triangular with unit
	    diagonal elements (lower trapezoidal if m > n), and U is upper
	    triangular (upper trapezoidal if m < n).

	    This is the right-looking Level 3 BLAS version of the algorithm.

       Parameters:
	   M

		     M is INTEGER
		     The number of rows of the matrix A.  M >= 0.

	   N

		     N is INTEGER
		     The number of columns of the matrix A.  N >= 0.

	   A

		     A is REAL array, dimension (LDA,N)
		     On entry, the M-by-N matrix to be factored.
		     On exit, the factors L and U from the factorization
		     A = P*L*U; the unit diagonal elements of L are not stored.

	   LDA

		     LDA is INTEGER
		     The leading dimension of the array A.  LDA >= max(1,M).

	   IPIV

		     IPIV is INTEGER array, dimension (min(M,N))
		     The pivot indices; for 1 <= i <= min(M,N), row i of the
		     matrix was interchanged with row IPIV(i).

	   INFO

		     INFO is INTEGER
		     = 0:  successful exit
		     < 0:  if INFO = -i, the i-th argument had an illegal value
		     > 0:  if INFO = i, U(i,i) is exactly zero. The factorization
			   has been completed, but the factor U is exactly
			   singular, and division by zero will occur if it is used
			   to solve a system of equations.

       Author:
	   Univ. of Tennessee

	   Univ. of California Berkeley

	   Univ. of Colorado Denver

	   NAG Ltd.

       Date:
	   November 2011

       Definition at line 109 of file sgetrf.f.

Author
       Generated automatically by Doxygen for LAPACK from the source code.

Version 3.4.2				 Tue Sep 25 2012			      sgetrf.f(3)


All times are GMT -4. The time now is 12:54 PM.

Unix & Linux Forums Content Copyrightę1993-2018. All Rights Reserved.
UNIX.COM Login
Username:
Password:  
Show Password