Symplectic Manifolds with Vanishing Action-Maslov Homomorphism

Details Symplectic Manifolds with Vanishing Action-Maslov Homomorphism Symplectic Manifolds with Vanishing Action-Maslov Homomorphism

2009-10-27

arxiv.org/abs/0910.5259v3

Mathematics

Symplectic Geometry

21 pages, rewritten to remove unnecessary information and correct typographical errors

Scientific paper

The action--Maslov homomorphism $I\co\pi_1(\text{Ham}(X,\omega))\to\R$ is an important tool for understanding the topology of the Hamiltonian group of monotone symplectic manifolds. We explore conditions for the vanishing of this homomorphism, and show that it is identically zero when the Seidel element has finite order and the homology satisfies property $\mathcal{D}$ (a generalization of having homology generated by divisor classes). We use these results to show that $I=0$ for products of projective spaces and the Grassmannian of $2$ planes in $\C^4$.

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