Danny Ofek

collaborators

Showing math.GRShow all

2 papers · 1 filter

math.GR2024

Lower bounds on the essential dimension of reductive groups

Danny Ofek

We introduce a technique for proving lower bounds on the essential dimension of split reductive groups. As an application, we strengthen the best previously known lower bounds for…

math.GR2024

Essential dimension of cohomology classes via valuation theory

Danny Ofek, Zinovy Reichstein

We give a formula for the essential dimension of a cohomology class $α$ in $H^{d} (K, Q_{p} / Z_{p} (d))$ when $K$ is a strictly Henselian field. This formula is particula…