Colin Ingalls

(Mathematics & Statistics, University of New Brunswick, Fredericton)

Rationality Of The Brauer-Severi Varieties Of Sklyanin Algebras

Date Friday, May 16, 2014

Iskovskih's conjecture states that a conic bundle over a surface is rational if and only if the surface has a pencil of rational curves which meet the discriminant in 3 or fewer points, (with one exceptional case). We generalize Iskovskih's proof that such conic bundles are rational, to the case of projective space bundles of higher dimension. The proof involves maximal orders and toric geometry. As a corollary we show that the Brauer-Severi variety of a Sklyanin algebra is rational.