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The Search for Pseudo Orthogonal Latin Squares of Order Six
Bussemaker, F.C.; Haemers, W.H.; Spence, E. - Tilburg University, School of Economics and Management - 1999
We report on the complete computer search for a strongly regular graph with parameters (36,15,6,6) and chromatic number six. The result is that no such graph exists.
Persistent link: https://www.econbiz.de/10011087224
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The search for pseudo orthogonal Latin squares of order six
Bussemaker, F.C.; Haemers, W.H.; Spence, E. - Tilburg University, School of Economics and Management - 2000
Persistent link: https://www.econbiz.de/10011090260
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A (49,16,3,6) strongly regular graph does not exist
Bussemaker, F.C.; Haemers, W.H.; Mathon, R.; Wilbrink, H.A. - Tilburg University, School of Economics and Management - 1988
Persistent link: https://www.econbiz.de/10011087165
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The Pseudo-Geometric Graphs for Generalised Quadrangles of Order (3,t)
Haemers, W.H.; Spence, E. - Tilburg University, School of Economics and Management - 2000
AMS classifications: 05E30; 51E12
Persistent link: https://www.econbiz.de/10011086812
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Graphs cospectral with distance-regular graphs
Haemers, W.H.; Spence, E. - Tilburg University, School of Economics and Management - 1993
Persistent link: https://www.econbiz.de/10011086836
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Characterizing distance regularity of graphs by the spectrum
van Dam, E.R.; Haemers, W.H.; Koolen, J.H.; Spence, E. - Tilburg University, School of Economics and Management - 2006
Persistent link: https://www.econbiz.de/10011088203
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The pseudo-geometric graphs for generalized quadrangles of order (3,t)
Haemers, W.H.; Spence, E. - Tilburg University, School of Economics and Management - 2001
Persistent link: https://www.econbiz.de/10011089636
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Characterizing Distance-Regularity of Graphs by the Spectrum
van Dam, Edwin Robert; Haemers, W.H.; Koolen, J.H.; … - Tilburg University, Center for Economic Research - 2005
AMS classifications: 05E30; 05B20
Persistent link: https://www.econbiz.de/10011090355
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Enumeration of Cospectral Graphs
Haemers, W.H.; Spence, E. - Tilburg University, Center for Economic Research - 2002
AMS classification: 05C50;
Persistent link: https://www.econbiz.de/10011091394
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Small Regular Graphs with Four Eigenvalues
van Dam, Edwin Robert; Spence, E. - Tilburg University, School of Economics and Management - 1996
For most feasible spectra of connected regular graphs with four distinct eigenvalues and at most 30 vertices we find all such graphs, using both theoretic and computer results.
Persistent link: https://www.econbiz.de/10011087114