ctrti2.f man page
ctrti2.f subroutine ctrti2 (UPLO, DIAG, N, A, LDA, INFO) CTRTI2 computes the inverse of a triangular matrix (unblocked algorithm). Purpose: UPLO DIAG N A LDA INFO Univ. of Tennessee Univ. of California Berkeley Univ. of Colorado Denver NAG Ltd. December 2016 Definition at line 112 of file ctrti2.f. Generated automatically by Doxygen for LAPACK from the source code. The man page ctrti2(3) is an alias of ctrti2.f(3).Synopsis
Functions/Subroutines
CTRTI2 computes the inverse of a triangular matrix (unblocked algorithm). Function/Subroutine Documentation
subroutine ctrti2 (character UPLO, character DIAG, integer N, complex, dimension( lda, * ) A, integer LDA, integer INFO)
CTRTI2 computes the inverse of a complex upper or lower triangular
matrix.
This is the Level 2 BLAS version of the algorithm.
UPLO is CHARACTER*1
Specifies whether the matrix A is upper or lower triangular.
= 'U': Upper triangular
= 'L': Lower triangular
DIAG is CHARACTER*1
Specifies whether or not the matrix A is unit triangular.
= 'N': Non-unit triangular
= 'U': Unit triangular
N is INTEGER
The order of the matrix A. N >= 0.
A is COMPLEX array, dimension (LDA,N)
On entry, the triangular matrix A. If UPLO = 'U', the
leading n by n upper triangular part of the array A contains
the upper triangular matrix, and the strictly lower
triangular part of A is not referenced. If UPLO = 'L', the
leading n by n lower triangular part of the array A contains
the lower triangular matrix, and the strictly upper
triangular part of A is not referenced. If DIAG = 'U', the
diagonal elements of A are also not referenced and are
assumed to be 1.
On exit, the (triangular) inverse of the original matrix, in
the same storage format.
LDA is INTEGER
The leading dimension of the array A. LDA >= max(1,N).
INFO is INTEGER
= 0: successful exit
< 0: if INFO = -k, the k-th argument had an illegal value
Author
Referenced By