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Man Pages
TESTING/LIN/zlaipd.f(3) LAPACK TESTING/LIN/zlaipd.f(3)

TESTING/LIN/zlaipd.f


subroutine zlaipd (n, a, inda, vinda)
ZLAIPD

ZLAIPD

Purpose:


ZLAIPD sets the imaginary part of the diagonal elements of a complex
matrix A to a large value. This is used to test LAPACK routines for
complex Hermitian matrices, which are not supposed to access or use
the imaginary parts of the diagonals.

Parameters

N


N is INTEGER
The number of diagonal elements of A.

A


A is COMPLEX*16 array, dimension
(1+(N-1)*INDA+(N-2)*VINDA)
On entry, the complex (Hermitian) matrix A.
On exit, the imaginary parts of the diagonal elements are set
to BIGNUM = EPS / SAFMIN, where EPS is the machine epsilon and
SAFMIN is the safe minimum.

INDA


INDA is INTEGER
The increment between A(1) and the next diagonal element of A.
Typical values are
= LDA+1: square matrices with leading dimension LDA
= 2: packed upper triangular matrix, starting at A(1,1)
= N: packed lower triangular matrix, starting at A(1,1)

VINDA


VINDA is INTEGER
The change in the diagonal increment between columns of A.
Typical values are
= 0: no change, the row and column increments in A are fixed
= 1: packed upper triangular matrix
= -1: packed lower triangular matrix

Author

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Definition at line 82 of file zlaipd.f.

Generated automatically by Doxygen for LAPACK from the source code.

Sun Jan 12 2025 15:13:35 Version 3.12.1

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