ctrti2 (l)  Linux Manuals
ctrti2: computes the inverse of a complex upper or lower triangular matrix
Command to display ctrti2
manual in Linux: $ man l ctrti2
NAME
CTRTI2  computes the inverse of a complex upper or lower triangular matrix
SYNOPSIS
 SUBROUTINE CTRTI2(

UPLO, DIAG, N, A, LDA, INFO )

CHARACTER
DIAG, UPLO

INTEGER
INFO, LDA, N

COMPLEX
A( LDA, * )
PURPOSE
CTRTI2 computes the inverse of a complex upper or lower triangular
matrix.
This is the Level 2 BLAS version of the algorithm.
ARGUMENTS
 UPLO (input) CHARACTER*1

Specifies whether the matrix A is upper or lower triangular.
= aqUaq: Upper triangular
= aqLaq: Lower triangular
 DIAG (input) CHARACTER*1

Specifies whether or not the matrix A is unit triangular.
= aqNaq: Nonunit triangular
= aqUaq: Unit triangular
 N (input) INTEGER

The order of the matrix A. N >= 0.
 A (input/output) COMPLEX array, dimension (LDA,N)

On entry, the triangular matrix A. If UPLO = aqUaq, 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 = aqLaq, 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 = aqUaq, 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 (input) INTEGER

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

= 0: successful exit
< 0: if INFO = k, the kth argument had an illegal value
Pages related to ctrti2
 ctrti2 (3)
 ctrtri (l)  computes the inverse of a complex upper or lower triangular matrix A
 ctrtrs (l)  solves a triangular system of the form A * X = B, A**T * X = B, or A**H * X = B,
 ctrttf (l)  copies a triangular matrix A from standard full format (TR) to rectangular full packed format (TF)
 ctrttp (l)  copies a triangular matrix A from full format (TR) to standard packed format (TP)
 ctrcon (l)  estimates the reciprocal of the condition number of a triangular matrix A, in either the 1norm or the infinitynorm
 ctrevc (l)  computes some or all of the right and/or left eigenvectors of a complex upper triangular matrix T
 ctrexc (l)  reorders the Schur factorization of a complex matrix A = Q*T*Q**H, so that the diagonal element of T with row index IFST is moved to row ILST