zlat2c (l) - Linux Manuals

zlat2c: converts a COMPLEX*16 triangular matrix, SA, to a COMPLEX triangular matrix, A

NAME

ZLAT2C - converts a COMPLEX*16 triangular matrix, SA, to a COMPLEX triangular matrix, A

SYNOPSIS

SUBROUTINE ZLAT2C(
UPLO, N, A, LDA, SA, LDSA, INFO )

    
CHARACTER UPLO

    
INTEGER INFO, LDA, LDSA, N

    
COMPLEX SA( LDSA, * )

    
COMPLEX*16 A( LDA, * )

PURPOSE

ZLAT2C converts a COMPLEX*16 triangular matrix, SA, to a COMPLEX triangular matrix, A. RMAX is the overflow for the SINGLE PRECISION arithmetic
ZLAT2C checks that all the entries of A are between -RMAX and RMAX. If not the convertion is aborted and a flag is raised. This is an auxiliary routine so there is no argument checking.

ARGUMENTS

UPLO (input) CHARACTER*1
= aqUaq: A is upper triangular;
= aqLaq: A is lower triangular.
N (input) INTEGER
The number of rows and columns of the matrix A. N >= 0.
A (input) COMPLEX*16 array, dimension (LDA,N)
On entry, the N-by-N triangular coefficient matrix A.
LDA (input) INTEGER
The leading dimension of the array A. LDA >= max(1,N).
SA (output) COMPLEX array, dimension (LDSA,N)
Only the UPLO part of SA is referenced. On exit, if INFO=0, the N-by-N coefficient matrix SA; if INFO>0, the content of the UPLO part of SA is unspecified.
LDSA (input) INTEGER
The leading dimension of the array SA. LDSA >= max(1,M).
INFO (output) INTEGER
= 0: successful exit.
= 1: an entry of the matrix A is greater than the SINGLE PRECISION overflow threshold, in this case, the content of the UPLO part of SA in exit is unspecified. ========= End of ZLAT2C

Pages related to zlat2c

  • zlat2c (3)
  • zlatbs (l) - solves one of the triangular systems A * x = s*b, A**T * x = s*b, or A**H * x = s*b,
  • zlatdf (l) - computes the contribution to the reciprocal Dif-estimate by solving for x in Z * x = b, where b is chosen such that the norm of x is as large as possible
  • zlatps (l) - solves one of the triangular systems A * x = s*b, A**T * x = s*b, or A**H * x = s*b,
  • zlatrd (l) - reduces NB rows and columns of a complex Hermitian matrix A to Hermitian tridiagonal form by a unitary similarity transformation Qaq * A * Q, and returns the matrices V and W which are needed to apply the transformation to the unreduced part of A
  • zlatrs (l) - solves one of the triangular systems A * x = s*b, A**T * x = s*b, or A**H * x = s*b,
  • zlatrz (l) - factors the M-by-(M+L) complex upper trapezoidal matrix [ A1 A2 ] = [ A(1:M,1:M) A(1:M,N-L+1:N) ] as ( R 0 ) * Z by means of unitary transformations, where Z is an (M+L)-by-(M+L) unitary matrix and, R and A1 are M-by-M upper triangular matrices
  • zlatzm (l) - routine i deprecated and has been replaced by routine ZUNMRZ
  • zla_gbamv (l) - performs one of the matrix-vector operations y := alpha*abs(A)*abs(x) + beta*abs(y),