o Hamiltonian systems are studied in Hamiltonian mechanics. o Hamiltonian mechanics is a reformulation of classical mechanics that was introduced in 1833 by Irish mathematician William Rowan Hamilton. o Hamiltonian mechanics arose from Lagrangian mechanics, a previous reformulation of classical mechanics introduced by Joseph Louis Lagrange(1736-1813)in 1788: ●born in Turin,Italy .lived part of his life in Prussia(Germany)and part in France Lagrange is alternatively considered a French and an Italian scientist 张样：上海交通大学数学系 第十八讲、前沿探索：Hamilton系统初步 Hamiltonian systems are studied in Hamiltonian mechanics. Hamiltonian mechanics is a reformulation of classical mechanics that was introduced in 1833 by Irish mathematician William Rowan Hamilton. Hamiltonian mechanics arose from Lagrangian mechanics, a previous reformulation of classical mechanics introduced by Joseph Louis Lagrange (1736–1813) in 1788: born in Turin, Italy lived part of his life in Prussia (Germany) and part in France Lagrange is alternatively considered a French and an Italian scientist ‹å: ˛°œåÆÍÆX 1õl˘!c˜&¢µHamiltonX⁄–⁄