@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},
}

@article{1454,
  abstract     = {We address the problem of finding Abelian instantons of finite energy on the Euclidean Schwarzschild manifold. This amounts to construct self-dual L2 harmonic 2-forms on the space. Gibbons found a non-topological L2 harmonic form in the Taub-NUT metric, leading to Abelian instantons with continuous energy. We imitate his construction in the case of the Euclidean Schwarzschild manifold and find a non-topological self-dual L2 harmonic 2-form on it. We show how this gives rise to Abelian instantons and identify them with SU(2)-instantons of Pontryagin number 2n2 found by Charap and Duff in 1977. Using results of Dodziuk and Hitchin we also calculate the full L2 harmonic space for the Euclidean Schwarzschild manifold.},
  author       = {Etesi, Gábor and Hausel, Tamas},
  issn         = {0393-0440},
  journal      = {Journal of Geometry and Physics},
  number       = {1-2},
  pages        = {126 -- 136},
  publisher    = {Elsevier},
  title        = {{Geometric interpretation of Schwarzschild instantons}},
  doi          = {10.1016/S0393-0440(00)00040-1},
  volume       = {37},
  year         = {2001},
}