Non-isomorphism conjecture for cyclotomic restricted rational Cherednik algebras

From papers

Let mm be even, let mp\frac{m}{p} be odd, and set k=Q(1m)k=\mathbb{Q}(\sqrt[m]{1}). Let Hc(μ(G(m,p,n)))\underline{\overline{H}}_{\underline{c}}(\mu(G(m,p,n))) and Hc(G(m,p,n))\overline H_c(G(m,p,n)) be the two kk-algebras defined in the paper. Non-isomorphism conjecture. The kk-algebras

Hc(μ(G(m,p,n)))andHc(G(m,p,n))\underline{\overline{H}}_{\underline{c}}(\mu(G(m,p,n)))\quad\text{and}\quad \overline H_c(G(m,p,n))

are not isomorphic. The conjecture is motivated by an explicit example showing non-isomorphism over Q\mathbb{Q}; the authors note that this example becomes isomorphic after extending scalars to Q(1)\mathbb{Q}(\sqrt{-1}), and that they have no explicit example disproving isomorphism over C\mathbb{C}.

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Sources & referencesView supporting material

Primary source

Yuri Bazlov and Edward Jones-Healey, “Twists of representations of complex reflection groups and rational Cherednik algebras”, arXiv:2501.06673 (2025).

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