zgttrs.f(3) [centos man page]

zgttrs.f(3)							      LAPACK							       zgttrs.f(3)

NAME

       zgttrs.f -

SYNOPSIS

   Functions/Subroutines
       subroutine zgttrs (TRANS, N, NRHS, DL, D, DU, DU2, IPIV, B, LDB, INFO)
	   ZGTTRS

Function/Subroutine Documentation
   subroutine zgttrs (characterTRANS, integerN, integerNRHS, complex*16, dimension( * )DL, complex*16, dimension( * )D, complex*16, dimension( *
       )DU, complex*16, dimension( * )DU2, integer, dimension( * )IPIV, complex*16, dimension( ldb, * )B, integerLDB, integerINFO)
       ZGTTRS

       Purpose:

	    ZGTTRS solves one of the systems of equations
	       A * X = B,  A**T * X = B,  or  A**H * X = B,
	    with a tridiagonal matrix A using the LU factorization computed
	    by ZGTTRF.

       Parameters:
	   TRANS

		     TRANS is CHARACTER*1
		     Specifies the form of the system of equations.
		     = 'N':  A * X = B	   (No transpose)
		     = 'T':  A**T * X = B  (Transpose)
		     = 'C':  A**H * X = B  (Conjugate transpose)

	   N

		     N is INTEGER
		     The order of the matrix A.

	   NRHS

		     NRHS is INTEGER
		     The number of right hand sides, i.e., the number of columns
		     of the matrix B.  NRHS >= 0.

	   DL

		     DL is COMPLEX*16 array, dimension (N-1)
		     The (n-1) multipliers that define the matrix L from the
		     LU factorization of A.

	   D

		     D is COMPLEX*16 array, dimension (N)
		     The n diagonal elements of the upper triangular matrix U from
		     the LU factorization of A.

	   DU

		     DU is COMPLEX*16 array, dimension (N-1)
		     The (n-1) elements of the first super-diagonal of U.

	   DU2

		     DU2 is COMPLEX*16 array, dimension (N-2)
		     The (n-2) elements of the second super-diagonal of U.

	   IPIV

		     IPIV is INTEGER array, dimension (N)
		     The pivot indices; for 1 <= i <= n, row i of the matrix was
		     interchanged with row IPIV(i).  IPIV(i) will always be either
		     i or i+1; IPIV(i) = i indicates a row interchange was not
		     required.

	   B

		     B is COMPLEX*16 array, dimension (LDB,NRHS)
		     On entry, the matrix of right hand side vectors B.
		     On exit, B is overwritten by the solution vectors X.

	   LDB

		     LDB is INTEGER
		     The leading dimension of the array B.  LDB >= max(1,N).

	   INFO

		     INFO is INTEGER
		     = 0:  successful exit
		     < 0:  if INFO = -k, the k-th argument had an illegal value

       Author:
	   Univ. of Tennessee

	   Univ. of California Berkeley

	   Univ. of Colorado Denver

	   NAG Ltd.

       Date:
	   September 2012

       Definition at line 138 of file zgttrs.f.

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

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

Check Out this Related Man Page

ZGTTRS(l)								 )								 ZGTTRS(l)

NAME

       ZGTTRS - solve one of the systems of equations A * X = B, A**T * X = B, or A**H * X = B,

SYNOPSIS

       SUBROUTINE ZGTTRS( TRANS, N, NRHS, DL, D, DU, DU2, IPIV, B, LDB, INFO )

	   CHARACTER	  TRANS

	   INTEGER	  INFO, LDB, N, NRHS

	   INTEGER	  IPIV( * )

	   COMPLEX*16	  B( LDB, * ), D( * ), DL( * ), DU( * ), DU2( * )

PURPOSE

       ZGTTRS solves one of the systems of equations A * X = B, A**T * X = B, or A**H * X = B, with a tridiagonal matrix A using the LU factoriza-
       tion computed by ZGTTRF.

ARGUMENTS

       TRANS   (input) CHARACTER
	       Specifies the form of the system of equations.  = 'N':  A * X = B     (No transpose)
	       = 'T':  A**T * X = B  (Transpose)
	       = 'C':  A**H * X = B  (Conjugate transpose)

       N       (input) INTEGER
	       The order of the matrix A.

       NRHS    (input) INTEGER
	       The number of right hand sides, i.e., the number of columns of the matrix B.  NRHS >= 0.

       DL      (input) COMPLEX*16 array, dimension (N-1)
	       The (n-1) multipliers that define the matrix L from the LU factorization of A.

       D       (input) COMPLEX*16 array, dimension (N)
	       The n diagonal elements of the upper triangular matrix U from the LU factorization of A.

       DU      (input) COMPLEX*16 array, dimension (N-1)
	       The (n-1) elements of the first super-diagonal of U.

       DU2     (input) COMPLEX*16 array, dimension (N-2)
	       The (n-2) elements of the second super-diagonal of U.

       IPIV    (input) INTEGER array, dimension (N)
	       The pivot indices; for 1 <= i <= n, row i of the matrix was interchanged with row IPIV(i).  IPIV(i) will always be either i or i+1;
	       IPIV(i) = i indicates a row interchange was not required.

       B       (input/output) COMPLEX*16 array, dimension (LDB,NRHS)
	       On entry, the matrix of right hand side vectors B.  On exit, B is overwritten by the solution vectors X.

       LDB     (input) INTEGER
	       The leading dimension of the array B.  LDB >= max(1,N).

       INFO    (output) INTEGER
	       = 0:  successful exit
	       < 0:  if INFO = -k, the k-th argument had an illegal value

LAPACK version 3.0						   15 June 2000 							 ZGTTRS(l)

Linux and UNIX Man Pages

zgttrs.f(3) [centos man page]

Check Out this Related Man Page