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Group action

{title2=$S^1\curvearrowright M$}

A circle action is a <group action> by $S^1$. Hamiltonian circle actions are especially useful in <symplectic reduction>.

Circle action

Past exam of the mathematics course of the University of Cambridge / 2006 / iii / Paper 20 / 3 / Solution

Circle action ( $S^{1} ↷ M$ )

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Circle action (S1↷M)

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Circle action ( $S^{1} ↷ M$ )

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