Symmetry Preserving Discretization of the Hamiltonian Systems with Holonomic Constraints

Autor:	Lili Xia, Mengmeng Wu, Xinsheng Ge
Jazyk:	angličtina
Rok vydání:	2021
Předmět:	lie symmetry preserving difference scheme hamiltonian systems numerical simulation Mathematics QA1-939
Zdroj:	Mathematics, Vol 9, Iss 22, p 2959 (2021)
Druh dokumentu:	article
ISSN:	2227-7390
DOI:	10.3390/math9222959
Popis:	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.
Databáze:	Directory of Open Access Journals
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