Nutku, Y.2016-02-082016-02-0819900305-4470http://hdl.handle.net/11693/26198The dynamical system proposed by Kermack and McKendrick to model the spread of epidemics is shown to admit bi-Hamiltonian structure without any restrictions on the rate constants. These two inequivalent Hamiltonian structures are compatible.EnglishArticle10.1088/0305-4470/23/21/013