Design theory
Distance regular covers of the complete graph
Journal of Combinatorial Theory Series B
A design and a code invariant under the simple group Co3
Journal of Combinatorial Theory Series A
Designs, Graphs, Codes, and Their Links
Designs, Graphs, Codes, and Their Links
Three-Class Association Schemes
Journal of Algebraic Combinatorics: An International Journal
Designs, Codes and Cryptography
The Search for Pseudo Orthogonal Latin Squares of OrderSix
Designs, Codes and Cryptography
A generalization of Wallis-Fon-Der-Flaass construction of strongly regular graphs
Journal of Algebraic Combinatorics: An International Journal
Association schemes on 28 points as mergings of a half-homogeneous coherent configuration
European Journal of Combinatorics
Journal of Combinatorial Theory Series A
Recent progress in algebraic design theory
Finite Fields and Their Applications
Bounds on s-Distance Sets with Strength t
SIAM Journal on Discrete Mathematics
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A spread of a strongly regular graph is a partitionof the vertex set into cliques that meet Delsarte's bound (alsocalled Hoffman's bound). Such spreads give rise to coloringsmeeting Hoffman's lower bound for the chromatic number and tocertain imprimitive three-class association schemes. These correspondenceslead to conditions for existence. Most examples come from spreadsand fans in (partial) geometries. We give other examples, includinga spread in the McLaughlin graph. For strongly regular graphsrelated to regular two-graphs, spreads give lower bounds forthe number of non-isomorphic strongly regular graphs in the switchingclass of the regular two-graph.