https://cpb.iphy.ac.cn/en/article/doi/10.1088/1009-1963/14/6/001
The discrete variational principle in Hamiltonian formalism and first integrals
The aim of this paper is to show that first integrals of discrete equation of motion for Hamiltonian systems can be determined explicitly by investigating the...
variational principlehamiltonian formalismfirst integralsdiscrete