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math.SG1998
A limit of toric symplectic forms that has no periodic Hamiltonians
Jean-Claude Hausmann, Allen Knutson
We calculate the Riemann-Roch number of some of the pentagon spaces defined in [Klyachko,Kapovich-Millson,HK1]. Using this, we show that while the regular pentagon space is diffeom…
math.SG1998
The cohomology ring of symplectic cuts
Jean-Claude Hausmann, Allen Knutson
The ``symplectic cut'' construction [Lerman] produces two symplectic orbifolds and from a symplectic manifold with a Hamiltonian circle action. We compute the ratio…