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TESTING/MATGEN/zlagge.f(3) LAPACK TESTING/MATGEN/zlagge.f(3)

TESTING/MATGEN/zlagge.f


subroutine zlagge (m, n, kl, ku, d, a, lda, iseed, work, info)
ZLAGGE

ZLAGGE

Purpose:


ZLAGGE generates a complex general m by n matrix A, by pre- and post-
multiplying a real diagonal matrix D with random unitary matrices:
A = U*D*V. The lower and upper bandwidths may then be reduced to
kl and ku by additional unitary transformations.

Parameters

M


M is INTEGER
The number of rows of the matrix A. M >= 0.

N


N is INTEGER
The number of columns of the matrix A. N >= 0.

KL


KL is INTEGER
The number of nonzero subdiagonals within the band of A.
0 <= KL <= M-1.

KU


KU is INTEGER
The number of nonzero superdiagonals within the band of A.
0 <= KU <= N-1.

D


D is DOUBLE PRECISION array, dimension (min(M,N))
The diagonal elements of the diagonal matrix D.

A


A is COMPLEX*16 array, dimension (LDA,N)
The generated m by n matrix A.

LDA


LDA is INTEGER
The leading dimension of the array A. LDA >= M.

ISEED


ISEED is INTEGER array, dimension (4)
On entry, the seed of the random number generator; the array
elements must be between 0 and 4095, and ISEED(4) must be
odd.
On exit, the seed is updated.

WORK


WORK is COMPLEX*16 array, dimension (M+N)

INFO


INFO is INTEGER
= 0: successful exit
< 0: if INFO = -i, the i-th argument had an illegal value

Author

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Definition at line 113 of file zlagge.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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