Integer homotopy invariant of a loop in the Lagrangian Grassmannian Λ(n), equal to its signed intersection number with the Maslov cycle. Used to grade Conley-Zehnder, Floer, and Morse-Bott indices of periodic Hamiltonian orbits.
Integer homotopy invariant of a loop in the Lagrangian Grassmannian Λ(n), equal to its signed intersection number with the Maslov cycle. Used to grade Conley-Zehnder, Floer, and Morse-Bott indices of periodic Hamiltonian orbits.