Hamiltonian

Hamiltonian may refer to:
 * Hamiltonian mechanics, a function that represents the total energy of a system
 * Hamiltonian (quantum mechanics), an operator corresponding to the total energy of that system
 * Dyall Hamiltonian, a modified Hamiltonian with two-electron nature
 * Molecular Hamiltonian, the Hamiltonian operator representing the energy of the electrons and nuclei in a molecule
 * Hamiltonian (control theory), a function used to solve a problem of optimal control for a dynamical system
 * Hamiltonian path, a path in a graph that visits each vertex exactly once
 * Hamiltonian group, a non-abelian group the subgroups of which are all normal
 * Hamiltonian economic program, the economic policies advocated by Alexander Hamilton, the first United States Secretary of the Treasury