table of contents
/home/abuild/rpmbuild/BUILD/lapack-3.12.0/SRC/dlauum.f(3) | Library Functions Manual | /home/abuild/rpmbuild/BUILD/lapack-3.12.0/SRC/dlauum.f(3) |
NAME¶
/home/abuild/rpmbuild/BUILD/lapack-3.12.0/SRC/dlauum.f
SYNOPSIS¶
Functions/Subroutines¶
subroutine DLAUUM (uplo, n, a, lda, info)
DLAUUM computes the product UUH or LHL, where U and L are upper or
lower triangular matrices (blocked algorithm).
Function/Subroutine Documentation¶
subroutine DLAUUM (character uplo, integer n, double precision, dimension( lda, * ) a, integer lda, integer info)¶
DLAUUM computes the product UUH or LHL, where U and L are upper or lower triangular matrices (blocked algorithm).
Purpose:
!> !> DLAUUM computes the product U * U**T or L**T * L, where the triangular !> factor U or L is stored in the upper or lower triangular part of !> the array A. !> !> If UPLO = 'U' or 'u' then the upper triangle of the result is stored, !> overwriting the factor U in A. !> If UPLO = 'L' or 'l' then the lower triangle of the result is stored, !> overwriting the factor L in A. !> !> This is the blocked form of the algorithm, calling Level 3 BLAS. !>
Parameters
UPLO
!> UPLO is CHARACTER*1 !> Specifies whether the triangular factor stored in the array A !> is upper or lower triangular: !> = 'U': Upper triangular !> = 'L': Lower triangular !>
N
!> N is INTEGER !> The order of the triangular factor U or L. N >= 0. !>
A
!> A is DOUBLE PRECISION array, dimension (LDA,N) !> On entry, the triangular factor U or L. !> On exit, if UPLO = 'U', the upper triangle of A is !> overwritten with the upper triangle of the product U * U**T; !> if UPLO = 'L', the lower triangle of A is overwritten with !> the lower triangle of the product L**T * L. !>
LDA
!> LDA is INTEGER !> The leading dimension of the array A. LDA >= 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.
Definition at line 101 of file dlauum.f.
Author¶
Generated automatically by Doxygen for LAPACK from the source code.
Version 3.12.0 | LAPACK |