Abstract
We classify the commutative association schemes such that all non-primary irreducible modules of their Terwilliger algebras are one-dimensional.
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Tanaka, R. Classification of commutative association schemes with almost commutative Terwilliger algebras. J Algebr Comb 33, 1–10 (2011). https://doi.org/10.1007/s10801-010-0230-z
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DOI: https://doi.org/10.1007/s10801-010-0230-z