The Kleshchev multipartitions arise from the representation theory of the Ariki–Koike algebras. In previous work, Li, Stanton, Xue, Yee, and the author considered a refined enumeration for the 2-dimensional case, namely, the Kleshchev bipartitions, by invoking the 2-residue statistic for partitions. In this paper, we make further elaboration by bounding the largest part of the bipartitions and show that the related counting functions are connected with two families of q -trinomial coefficients introduced by Andrews and Baxter.
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Shane Chern (2026) studied this question.
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