@article{1460,
abstract = {We calculate the E-polynomials of certain twisted GL(n,ℂ)-character varieties Mn of Riemann surfaces by counting points over finite fields using the character table of the finite group of Lie-type GL(n, q) and a theorem proved in the appendix by N. Katz. We deduce from this calculation several geometric results, for example, the value of the topological Euler characteristic of the associated PGL(n,ℂ)-character variety. The calculation also leads to several conjectures about the cohomology of Mn: an explicit conjecture for its mixed Hodge polynomial; a conjectured curious hard Lefschetz theorem and a conjecture relating the pure part to absolutely indecomposable representations of a certain quiver. We prove these conjectures for n=2.},
author = {Tamas Hausel and Rodríguez Villegas, Fernando},
journal = {Inventiones Mathematicae},
number = {3},
pages = {555 -- 624},
publisher = {Springer},
title = {{Mixed Hodge polynomials of character varieties: With an appendix by Nicholas M. Katz}},
doi = {10.1007/s00222-008-0142-x},
volume = {174},
year = {2008},
}