20.500.12556/RUP-3416 A spectral proof of the uniqueness of a strongly regular graph with parameters (81, 20, 1, 6) We give a new proof that there exists a unique strongly regular graph with parameters (81, 20, 1, 6). Unlike the finite geometry approach used by Brouwerand haemers, we use linear algebra and spectral graph theory concepts, namely the technique of star complements, in our proof. graph theory true true false Neznan jezik Neznan jezik Delo ni kategorizirano 2013-10-15 12:08:36 2013-10-15 12:08:36 2024-03-01 12:10:48 0000-00-00 00:00:00 2009 0 0 str. 957-968 no. 4 Vol. 30 2009 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 0195-6698 519.17 1024073812 http://dx.doi.org/10.1016/j.ejc.2008.07.021 1 https://repozitorij.upr.si/Dokument.php?lang=slv&id=3416 Inštitut Andrej Marušič 0 0 0