Green, Bryan C.J.Olesky, D.D.van den Driessche, P.2009-09-042009-09-0419932009-09-04http://hdl.handle.net/1828/1733entechnical reports (mathematics and statistics)Classes of sign nonsingular matrices with a specified number of zero entriesTechnical ReportDepartment of Computer ScienceDepartment of Mathematics and Statistics