Morris, W.Todd, M. J.2007-11-092007-11-091984-07631https://hdl.handle.net/1813/8516Symmetry and Positive Definiteness in Oriented Matroids2137504 bytesapplication/pdfen-USOperations ResearchIndustrial Engineeringtechnical reportSymmetry and Positive Definiteness in Oriented Matroidstechnical report