
The singularity confinement test is very useful for isolating integrable cases of discrete-time dynamical systems, but it does not provide a sufficient criterion for integrability. Quite recently a new property of the bilinear equations appearing in discrete soliton theory has been noticed: the iterates of such equations are Laurent polynomials in the initial data. A large class of non-integrable mappings of the plane are presented which both possess this Laurent property and have confined singularities.
13 pages; typos corrected; comments & references added; reformulation of theorem
Nonlinear Sciences - Exactly Solvable and Integrable Systems, FOS: Physical sciences, Soliton theory, asymptotic behavior of solutions of infinite-dimensional Hamiltonian systems, Exactly Solvable and Integrable Systems (nlin.SI)
Nonlinear Sciences - Exactly Solvable and Integrable Systems, FOS: Physical sciences, Soliton theory, asymptotic behavior of solutions of infinite-dimensional Hamiltonian systems, Exactly Solvable and Integrable Systems (nlin.SI)
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