Symplectic group actions and covering spaces

Montaldi, James and Ortega, Juan-Pablo (2007) Symplectic group actions and covering spaces. [MIMS Preprint]

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Abstract

For symplectic group actions which are not Hamiltonian there are two ways to define reduction. Firstly using the cylinder-valued momentum map and secondly lifting the action to any Hamiltonian cover (such as the universal cover), and then performing symplectic reduction in the usual way. We show that provided the action is free and proper, and the Hamiltonian holonomy associated to the action is closed, the natural projection from the latter to the former is a symplectic covering. At the same time we give a classification of all Hamiltonian coverings of a given symplectic group action. The main properties of the lifting of a group action to a cover are studied.

Item Type:	MIMS Preprint
Uncontrolled Keywords:	lifted group action, symplectic reduction, universal covering, Hamiltonian holonomy, momentum map
Subjects:	MSC 2010, the AMS's Mathematics Subject Classification > 22 Topological groups, Lie groups MSC 2010, the AMS's Mathematics Subject Classification > 37 Dynamical systems and ergodic theory MSC 2010, the AMS's Mathematics Subject Classification > 51 Geometry (See also algebraic geometry)
Depositing User:	Dr James Montaldi
Date Deposited:	21 May 2007
Last Modified:	08 Nov 2017 18:18
URI:	https://eprints.maths.manchester.ac.uk/id/eprint/800

Available Versions of this Item

• Symplectic group actions and covering spaces. (deposited 21 May 2007) [Currently Displayed]
  • Symplectic group actions and covering spaces. (deposited 18 Dec 2007)
    • Symplectic group actions and covering spaces. (deposited 19 Aug 2008)

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