A residue condition analogous to the Ginzburg-Kapranov-Vasserot construction of DAHA characterizes exactly which localized torus elements come from a quantized BFN Coulomb branch A_{G,N}, and yields a mathematical sphere trace for conical branches.
Residue construction of Hecke algebras
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Residue construction of quantized Coulomb branches
A residue condition analogous to the Ginzburg-Kapranov-Vasserot construction of DAHA characterizes exactly which localized torus elements come from a quantized BFN Coulomb branch A_{G,N}, and yields a mathematical sphere trace for conical branches.