dsytrs_aa_2stage.f

Section: LAPACK (3)
Updated: Tue Nov 14 2017
Page Index
 

NAME

dsytrs_aa_2stage.f  

SYNOPSIS


 

Functions/Subroutines


subroutine dsytrs_aa_2stage (UPLO, N, NRHS, A, LDA, TB, LTB, IPIV, IPIV2, B, LDB, INFO)
DSYTRS_AA_2STAGE  

Function/Subroutine Documentation

 

subroutine dsytrs_aa_2stage (character UPLO, integer N, integer NRHS, double precision, dimension( lda, * ) A, integer LDA, double precision, dimension( * ) TB, integer LTB, integer, dimension( * ) IPIV, integer, dimension( * ) IPIV2, double precision, dimension( ldb, * ) B, integer LDB, integer INFO)

DSYTRS_AA_2STAGE

Purpose:

 DSYTRS_AA_2STAGE solves a system of linear equations A*X = B with a real
 symmetric matrix A using the factorization A = U*T*U**T or
 A = L*T*L**T computed by DSYTRF_AA_2STAGE.


 

Parameters:

UPLO

          UPLO is CHARACTER*1
          Specifies whether the details of the factorization are stored
          as an upper or lower triangular matrix.
          = 'U':  Upper triangular, form is A = U*T*U**T;
          = 'L':  Lower triangular, form is A = L*T*L**T.


N

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


NRHS

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


A

          A is DOUBLE PRECISION array, dimension (LDA,N)
          Details of factors computed by DSYTRF_AA_2STAGE.


LDA

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


TB

          TB is DOUBLE PRECISION array, dimension (LTB)
          Details of factors computed by DSYTRF_AA_2STAGE.


LTB

          The size of the array TB. LTB >= 4*N.


IPIV

          IPIV is INTEGER array, dimension (N)
          Details of the interchanges as computed by
          DSYTRF_AA_2STAGE.


IPIV2

          IPIV2 is INTEGER array, dimension (N)
          Details of the interchanges as computed by
          DSYTRF_AA_2STAGE.


B

          B is DOUBLE PRECISION array, dimension (LDB,NRHS)
          On entry, the right hand side matrix B.
          On exit, the solution matrix 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 = -i, the i-th argument had an illegal value


 

Author:

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Date:

November 2017

Definition at line 140 of file dsytrs_aa_2stage.f.  

Author

Generated automatically by Doxygen for LAPACK from the source code.


 

Index

NAME
SYNOPSIS
Functions/Subroutines
Function/Subroutine Documentation
subroutine dsytrs_aa_2stage (character UPLO, integer N, integer NRHS, double precision, dimension( lda, * ) A, integer LDA, double precision, dimension( * ) TB, integer LTB, integer, dimension( * ) IPIV, integer, dimension( * ) IPIV2, double precision, dimension( ldb, * ) B, integer LDB, integer INFO)
Author
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