We derive dispersivelike lattice functions in a way totally invariant under canonical transformation. This bridges the gap between invariant treatments that use only the coefficients of the coupled Courant-Snyder invariants as lattice functions and treatments that introduce dispersive lattices functions that depend on particular parametrizations.

• Received 9 September 1997

DOI:https://doi.org/10.1103/PhysRevE.58.2481