@article{21981,
  abstract     = {For Hamiltonian actions of semidirect products G = FxH, we study 2-cocycles arising from residual Hamiltonian actions of F on Hamiltonian reductions for H. The motivation comes from the study of Teichmüller spaces for surfaces with boundary, which carry Hamiltonian actions of the Virasoro algebra. In this paper, we give a general setup for the problem, and we suggest an easier way to obtain the Gelfand-Fuchs 2-cocycles for Hamiltonian actions on Teichmüller spaces.},
  author       = {Goncharov, Viacheslav},
  issn         = {1879-1662},
  journal      = {Journal of Geometry and Physics},
  publisher    = {Elsevier},
  title        = {{An easier way to compute 2-cocycles coming from a reduction for semidirect products}},
  doi          = {10.1016/j.geomphys.2026.105878},
  volume       = {227},
  year         = {2026},
}