Sobhan Seyfaddini

University of California at Berkeley

October 28, 2011

After reviewing spectral invariants, I will write down an estimate, which under certain assumptions, relates the spectral invariants of a Hamiltonian to the C^{0}-distance of its flow from the identity. I will also show that, unlike the Hofer norm, the spectral norm is C^{0}-continuous on surfaces. Time permitting, I will present an application to the study of area preserving disk maps.