where **nnz** is the number of non-zeros, **nrows** is the number of rows,
and **ncols** is the number of columns of the sparse matrix.
In order to study the effect of clustered spectra on the accuracy of
the error estimate, synthetic diagonal test matrices having clustered
or multiple diagonal elements were also used as input (see
[22]).

**Table 1:** Test matrices used to evaluate the performance of CSI-MSVD.

Michael W. Berry (berry@cs.utk.edu)

Sun May 19 11:34:27 EDT 1996