Central extensions of Lie algebras of symplectic and divergence free vector fields
Tom 110 / 2016
Banach Center Publications 110 (2016), 105-114 MSC: Primary 17B56; Secondary 17B66, 58D05. DOI: 10.4064/bc110-0-7
In this review paper, we present several results on central extensions of the Lie algebra of symplectic (Hamiltonian) vector fields, and compare them with similar results for the Lie algebra of (exact) divergence free vector fields. In particular, we comment on universal central extensions and integrability to the group level.