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arxiv: 1904.10962 · v1 · pith:6NJBXQ6Nnew · submitted 2019-04-24 · 🧮 math.SG · math.AG

Classification of six dimensional monotone symplectic manifolds admitting semifree circle actions II

classification 🧮 math.SG math.AG
keywords dimensionalomegaactionactionsadmittingfanohamiltonianmanifold
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Let $(M,\omega_M)$ be a six dimensional closed monotone symplectic manifold admitting an effective semifree Hamiltonian $S^1$-action. We show that if the maximal and the minimal fixed component are both two dimensional, then $(M,\omega_M)$ is $S^1$-equivariantly symplectomorphic to some K\"{a}hler Fano manifold $(X, \omega_X, J)$ equipped with a certain holomorphic Hamiltonian $S^1$-action. We also give a complete list of all such Fano manifolds together with an explicit description of the corresponding $S^1$-actions.

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