Stability conjecture for semisimplicity of twisted cyclotomic quiver Hecke algebras

Assume p(e+1)p\nmid(e+1), let I=0,1,,eI=\\{0,1,\ldots,e\\}, and let RnΛ(I)R^{\Lambda}_n(I) denote the cyclotomic quiver Hecke algebra associated with a dominant integral weight ΛP+\Lambda\in P^+. Stability conjecture. The following equivalences should hold:

  1. If h0,Λ2N\langle h_0,\Lambda\rangle\in 2\mathbb{N}, then RnΛ(I)R^{\Lambda}_n(I) is semisimple if and only if RnΛ+Λ0(I)R^{\Lambda+\Lambda_0}_n(I) is semisimple.
  2. If he,Λ2N\langle h_e,\Lambda\rangle\in 2\mathbb{N}, then RnΛ(I)R^{\Lambda}_n(I) is semisimple if and only if RnΛ+Λe(I)R^{\Lambda+\Lambda_e}_n(I) is semisimple.

This is motivated by the preceding semisimplicity equivalence and is proposed after the known “if” direction of the related criterion. The equivalences for arbitrary dominant integral weights remain conjectural in the supplied text.

Sources & referencesView supporting material

Primary source

Lei Shi, “On the semisimplicity and Schur elements of (super)symmetric superalgebras”, arXiv:2605.04745 (2026).

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