Refined Langlands duality conjecture for representation spaces
Refined Langlands duality conjecture for representation spaces
Let be a finite subgroup of . For an Abelian central subgroup of a connected compact simple Lie group , set , with central extension
Let and be the Langlands duals, so that
For the representation spaces and finite symmetry groups defined in the source, let be the swap isomorphism. Refined Langlands duality conjecture. The representation of and the representation of are equivalent after identifying the two groups using . The refinement predicts an equivalence of the corresponding representations, not merely equality of their dimensions or of homomorphism counts. The source gives no resolution of this refined statement; it is presented as a conjectural refinement of the preceding conjecture.
Sources & referencesView supporting material
Primary source
Yuki Kojima and Yuji Tachikawa, “On homomorphisms from finite subgroups of SU(2) to Langlands dual pairs of groups”, arXiv:2505.01253 (2025).
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