LAPACK  3.4.2
LAPACK: Linear Algebra PACKage
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zhetrs2.f File Reference

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subroutine zhetrs2 (UPLO, N, NRHS, A, LDA, IPIV, B, LDB, WORK, INFO)

Function/Subroutine Documentation

subroutine zhetrs2 ( character  UPLO,
integer  N,
integer  NRHS,
complex*16, dimension( lda, * )  A,
integer  LDA,
integer, dimension( * )  IPIV,
complex*16, dimension( ldb, * )  B,
integer  LDB,
complex*16, dimension( * )  WORK,
integer  INFO 


Download ZHETRS2 + dependencies [TGZ] [ZIP] [TXT]
 ZHETRS2 solves a system of linear equations A*X = B with a complex
 Hermitian matrix A using the factorization A = U*D*U**H or
 A = L*D*L**H computed by ZHETRF and converted by ZSYCONV.
          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*D*U**H;
          = 'L':  Lower triangular, form is A = L*D*L**H.
          N is INTEGER
          The order of the matrix A.  N >= 0.
          NRHS is INTEGER
          The number of right hand sides, i.e., the number of columns
          of the matrix B.  NRHS >= 0.
          A is COMPLEX*16 array, dimension (LDA,N)
          The block diagonal matrix D and the multipliers used to
          obtain the factor U or L as computed by ZHETRF.
          LDA is INTEGER
          The leading dimension of the array A.  LDA >= max(1,N).
          IPIV is INTEGER array, dimension (N)
          Details of the interchanges and the block structure of D
          as determined by ZHETRF.
          B is COMPLEX*16 array, dimension (LDB,NRHS)
          On entry, the right hand side matrix B.
          On exit, the solution matrix X.
          LDB is INTEGER
          The leading dimension of the array B.  LDB >= max(1,N).
          WORK is REAL array, dimension (N)
          INFO is INTEGER
          = 0:  successful exit
          < 0:  if INFO = -i, the i-th argument had an illegal value
Univ. of Tennessee
Univ. of California Berkeley
Univ. of Colorado Denver
NAG Ltd.
November 2011

Definition at line 127 of file zhetrs2.f.

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