Geodesic
Every 3-equivalenced association scheme is Frobenius
Journal of Algebraic Combinatorics, Tome 41 (2015) no. 1, pp. 217-228.

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

For a positive integer $k$ we say that an association scheme with more than one point is $k$-equivalenced if each non-diagonal relation has valency $k$. In this paper we prove that every 3-equivalenced association scheme is Frobenius, that is, the set of relations coincides with the set of orbitals of a Frobenius group.
Classification : 05E30
Keywords: association schemes, 3-equivalenced, Frobenius 
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     title = {Every 3-equivalenced association scheme is {Frobenius}},
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Hirasaka, Mitsugu; Kim, Kyoung-Tark; Park, Jeong Rye. Every 3-equivalenced association scheme is Frobenius. Journal of Algebraic Combinatorics, Tome 41 (2015) no. 1, pp. 217-228. http://geodesic.mathdoc.fr/item/JAC_2015__41_1_a0/