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

TESTING/MATGEN/slarge.f


subroutine slarge (n, a, lda, iseed, work, info)
SLARGE

SLARGE

Purpose:


SLARGE pre- and post-multiplies a real general n by n matrix A
with a random orthogonal matrix: A = U*D*U'.

Parameters

N


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

A


A is REAL array, dimension (LDA,N)
On entry, the original n by n matrix A.
On exit, A is overwritten by U*A*U' for some random
orthogonal matrix U.

LDA


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

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 REAL array, dimension (2*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 86 of file slarge.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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