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Theoretical study demonstrates a combinatorial subdivision map between affine KLRW algebras, highlighting a partial categorification of runner removal theorems.
We develop a combinatorial framework for the subdivision map -- introduced by Maksimau, Mathas and Tubbenhauer -- between the KLR(W) algebras of type A⁽¹⁾ₑ₋₁ and type A⁽¹⁾ₑ, which provides a partial categorification of the runner removal theorems.
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Tao Qin (2026) studied this question.
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