Nontoric Hamiltonian circle actions on four-dimensional symplectic orbifolds

Singer, S.; Talvacchia, J.; Watson, N.

doi:10.1090/S0002-9939-99-04767-X

Nontoric Hamiltonian circle actions on four-dimensional symplectic orbifolds
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by S. F. Singer, J. Talvacchia and N. Watson PDF

Proc. Amer. Math. Soc. 127 (1999), 937-940 Request permission

Abstract:

We construct four-dimensional symplectic orbifolds admitting Hamiltonian circle actions with isolated fixed points, but not admitting any Hamiltonian action of a two-torus. One example is linear, and one example is compact.

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