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Arithmetic and representation theory of wild character varieties

Tamas Hausel, Martin Mereb, Michael Lennox Wong

12/4/16 Published in : arXiv:1604.03382

We count points over a finite field on wild character varieties of Riemann surfaces for singularities with regular semisimple leading term. The new feature in our counting formulas is the appearance of characters of Yokonuma-Hecke algebras. Our result leads to the conjecture that the mixed Hodge polynomials of these character varieties agree with previously conjectured perverse Hodge polynomials of certain twisted parabolic Higgs moduli spaces, indicating the possibility of a P=W conjecture for a suitable wild Hitchin system.

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Tropical Homology

A new computation of the critical point for the planar random-cluster model with q\ge1

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