A note on hybrid preconditioners for large-scale normal equations arising from interior-point methods.

Marta I. Velazco Fontova Aurelio R. L. Oliveira F. F. Campos A note on hybrid preconditioners for large-scale normal equations arising from interior-point methods. 321-332 2010 25 Optimization Methods and Software 2 http://dx.doi.org/10.1080/10556780902992829 db/journals/oms/oms25.html#FontovaOC10