Hamiltonian may refer to In mathematics: Hamiltonian system Hamiltonian path, in graph theory Hamiltonian cycle, a special case of a Hamiltonian path Hamiltonian group, in group theory Hamiltonian (control theory) Hamiltonian matrix Hamiltonian flow Hamiltonian vector field Hamiltonian numbers (or quaternions) In physics: Hamiltonian system Hamiltonian mechanics in classical mechanics… (More on Hamiltonian)