ngraph.sparse-collection
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Subset of the University of Florida sparse matrix collection
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# HB/young3c
UF Sparse Matrix Collection, Tim Davis
http://www.cise.ufl.edu/research/sparse/matrices/HB/young3c
[real matrix from aero research, David Young, corrected RUA version]
id: 280
date: 1984
author: D. Young
ed: I. Duff, R. Grimes, J. Lewis
fields: title A name id notes date author ed kind
kind: acoustics problem
notes:
The YOUNG*C matrices originally appeared in the Harwell/Boeing
collection as type CSA (complex symmetric). However, both upper
and lower triangular parts are present in the original files
(an invalid specification; only the lower part can be present
in the file). If the entries in the upper triangular part are
considered as part of the matrix, the matrices become unsymmetric.
The matrices have been corrected in the UF Sparse Matrix Collection
by changing their type to CUA so that the entries in the original
files are not ignored. In addition, the YOUNG3C matrix has a zero
imaginary part, and thus appears here as a real matrix.
