Geodesic
Commutativity of association schemes of prime square order having non-trivial thin closed subsets
Journal of Algebraic Combinatorics, Tome 27 (2008) no. 3, pp. 307-316.

Voir la notice de l'article provenant de la source Electronic Library of Mathematics

Summary: Through a study of the structure of the modular adjacency algebra over a field of positive characteristic $p$ for a scheme of prime order $p$ and utilizing the fact that every scheme of prime order is commutative, we show that every association scheme of prime square order having a non-trivial thin closed subset is commutative.
Classification : 05E30
Keywords: keywords association scheme, closed subset, character 
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     title = {Commutativity of association schemes of prime square order having non-trivial thin closed subsets},
     journal = {Journal of Algebraic Combinatorics},
     pages = {307--316},
     publisher = {mathdoc},
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     year = {2008},
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Hanaki, Akihide; Hirasaka, Mitsugu; Uno, Katsuhiro. Commutativity of association schemes of prime square order having non-trivial thin closed subsets. Journal of Algebraic Combinatorics, Tome 27 (2008) no. 3, pp. 307-316. http://geodesic.mathdoc.fr/item/JAC_2008__27_3_a4/