Maslov index and Spectral Flow
In , Arnol'd discussed the Maslov index as an intersection number of Lagrangian loop with the Maslov cycle, whereas in , Robbin and Salamon gave a de nition of the Maslov index in term of the signature of crossing form. Furthermore, the Maslov index is characterized by axioms. The index is a homotopy invariant with xed endpoints, and is additive for the concatenation of Lagrangian paths. Application wise, in , Floer studied the case where the Hessian (a second order di erential...[Show more]
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