Proof of Shvartsman's conjecture on braid groups of projective complex reflection groups

Abstract

The purpose of this note is to prove a conjecture of Shvartsman relating a complex projective reflection group with the quotient of a suitable complex braid group by its center. Shvartsman originally proved this result in the case of real projective reflection groups, and we extend it to all complex projective reflection groups. Our study also allows us to correct a result of Brou\'e, Malle, Rouquier on projective reflection groups.