Symmetry Preserving Discretization of the Hamiltonian Systems with Holonomic Constraints

Lili Xia, Mengmeng Wu and Xinsheng Ge
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Lili Xia: College of Science, Beijing Information Science and Technology University, Beijing 100192, China
Mengmeng Wu: College of Science, Beijing Information Science and Technology University, Beijing 100192, China
Xinsheng Ge: Mechanical Electrical Engineering School, Beijing Information Science and Technology University, Beijing 100192, China

Mathematics, 2021, vol. 9, issue 22, 1-13

Abstract: Symmetry preserving difference schemes approximating equations of Hamiltonian systems are presented in this paper. For holonomic systems in the Hamiltonian framework, the symmetrical operators are obtained by solving the determining equations of Lie symmetry with the Maple procedure. The difference type of symmetry preserving invariants are constructed based on the three points of the lattice and the characteristic equations. The difference scheme is constructed by using these discrete invariants. An example is presented to illustrate the applications of the results. The solutions of the invariant numerical schemes are compared to the noninvariant ones, the standard and the exact solutions.

Keywords: lie symmetry preserving; difference scheme; hamiltonian systems; numerical simulation (search for similar items in EconPapers)
JEL-codes: C (search for similar items in EconPapers)
Date: 2021
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