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arXiv 1903.11684math.SGmath.AT
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GKM theory and Hamiltonian non-Kähler actions in dimension $6$

Oliver Goertsches, Panagiotis Konstantis, Leopold Zoller

英文摘要:

Using the classification of $6$-dimensional manifolds by Wall, Jupp and Žubr, we observe that the diffeomorphism type of simply-connected, compact $6$-dimensional integer GKM $T^2$-manifolds is encoded in their GKM graph. As an application, we show that the $6$-dimensional manifolds on which Tolman and Woodward constructed Hamiltonian, non-Kähler $T^2$-actions with finite fixed point set are both diffeomorphic to Eschenburg's twisted flag manifold $SU(3)//T^2$. In particular, they admit a noninvariant Kähler structure.

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