Convexity properties of presymplectic moment maps
JOURNAL OF SYMPLECTIC GEOMETRY(2019)
摘要
The convexity and Morse-theoretic properties of moment maps in symplectic geometry typically fail for presymplectic manifolds. We find a condition on presymplectic moment maps that prevents these failures. Our result applies for instance to Prato's quasifolds and to Hamiltonian actions on contact manifolds and cosymplectic manifolds.
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