This set of matrices if from the application of the Hydro-Quebec power systems' small-signal model. In the application, one wants to compute all eigenvalues a + b i in a box of the complex plane. Specifically, a_min < a < a_max and, in general, a_min = -300 and a_max = 300. b_min < b < b_max, and, in general, b_min = 0 and b_max = . Note that the matrices are highly unbalanced.

Matrices in this set:

• QH1484 (real unsymmetric, 1484 by 1484, 6110 entries)
• QH768 (real unsymmetric, 768 by 768, 2934 entries)
• QH882 (real unsymmetric, 882 by 882, 3354 entries)

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Last change in this page: Wed Sep 22 13:37:27 US/Eastern 2004 [Comments: ]