Perverse topological mirror symmetry for rank two character varieties

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Let CC be a compact Riemann surface of genus gg, let rr be the rank, and let MDol(C,SL⁡r)M_{\mathrm{Dol}}(C,\operatorname{SL}_r) and MDol(C,PGL⁡r)M_{\mathrm{Dol}}(C,\operatorname{PGL}_r) be the corresponding Dolbeault moduli spaces. Set

dim⁡=2(r2−1)(g−1).\dim=2(r^2-1)(g-1).

Let PIEPIE be the perverse intersection E-polynomial, let PIEstPIE_{\mathrm{st}} be the stringy perverse intersection E-polynomial, and let Γ=Pic⁡0(C)[r]\Gamma=\operatorname{Pic}^0(C)[r] act on MDol(C,SL⁡r)M_{\mathrm{Dol}}(C,\operatorname{SL}_r) by tensorisation.

Perverse topological mirror symmetry.

PIE(MDol(C,SL⁡r);u,v,q)=(uvq)dim⁡PIEst(MDol(C,PGL⁡r);u,v,1uvq).PIE(M_{\mathrm{Dol}}(C,\operatorname{SL}_r);u,v,q)=(uvq)^{\dim}PIE_{\mathrm{st}}\left(M_{\mathrm{Dol}}(C,\operatorname{PGL}_r);u,v,\frac{1}{uvq}\right).

The conjecture predicts an exchange of the perverse Hodge numbers under topological mirror symmetry. Its specialization at q=1q=1 recovers the degree-zero intersection-E-polynomial identity, while relative hard Lefschetz supplies the corresponding duality for the perverse variable.

References

Primary source

Mirko Mauri, “Topological mirror symmetry for rank two character varieties of surface groups”, arXiv:2101.04659 (2021).

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