3 links
Matrix Market
math.nist.gov
A visual repository of test data for use in comparative studies of algorithms for numerical linear algebra, featuring nearly 500 sparse matrices from a variety of app…
Pseudospectra Gateway
eb.comlab.ox.ac.uk
The pseudospectrum of a matrix provides information about the behavior of the eigenvalues of A when A is subject to perturbations. Links to other resources.
Sparse Matrix Collection (T. Davis)
cise.ufl.edu
A collection of large sparse matrices from many scientific disciplines with links and software pieces to operate on matrix data structures.