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Figure Properties - SERC

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See Also eig, qz, schur<br />

Matrix A Routine<br />

Real symmetric DSYTRD<br />

DSYTRD, DORGTR, (with output P)<br />

Real nonsymmetric DGEHRD<br />

DGEHRD, DORGHR (with output P)<br />

Complex Hermitian ZHETRD<br />

ZHETRD, ZUNGTR (with output P)<br />

Complex non-Hermitian ZGEHRD<br />

ZGEHRD, ZUNGHR (with output P)<br />

Inputs of Type Single<br />

For inputs of type single, hess uses the following LAPACK routines to<br />

compute the Hessenberg form of a matrix:<br />

Matrix A Routine<br />

Real symmetric SSYTRD<br />

SSYTRD, DORGTR, (with output P)<br />

Real nonsymmetric SGEHRD<br />

SGEHRD, SORGHR (with output P)<br />

Complex Hermitian CHETRD<br />

CHETRD, CUNGTR (with output P)<br />

Complex non-Hermitian CGEHRD<br />

CGEHRD, CUNGHR (with output P)<br />

References [1] Anderson, E., Z. Bai, C. Bischof, S. Blackford, J. Demmel, J. Dongarra,<br />

J. Du Croz, A. Greenbaum, S. Hammarling, A. McKenney, and D. Sorensen,<br />

LAPACK User’s Guide<br />

(http://www.netlib.org/lapack/lug/lapack_lug.html), Third Edition,<br />

SIAM, Philadelphia, 1999.<br />

hess<br />

2-1061

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