Home Man
Search
Today's Posts
Register

Linux & Unix Commands - Search Man Pages

CentOS 7.0 - man page for cgetf2.f (centos section 3)

cgetf2.f(3)				      LAPACK				      cgetf2.f(3)

NAME
       cgetf2.f -

SYNOPSIS
   Functions/Subroutines
       subroutine cgetf2 (M, N, A, LDA, IPIV, INFO)
	   CGETF2 computes the LU factorization of a general m-by-n matrix using partial pivoting
	   with row interchanges (unblocked algorithm).

Function/Subroutine Documentation
   subroutine cgetf2 (integerM, integerN, complex, dimension( lda, * )A, integerLDA, integer,
       dimension( * )IPIV, integerINFO)
       CGETF2 computes the LU factorization of a general m-by-n matrix using partial pivoting
       with row interchanges (unblocked algorithm).

       Purpose:

	    CGETF2 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 2 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 COMPLEX 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 = -k, the k-th argument had an illegal value
		     > 0: if INFO = k, U(k,k) 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:
	   September 2012

       Definition at line 109 of file cgetf2.f.

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

Version 3.4.2				 Tue Sep 25 2012			      cgetf2.f(3)


All times are GMT -4. The time now is 06:02 AM.

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