Mathematics – Numerical Analysis
Scientific paper
2009-10-19
Journal of Numerical Analysis, Industrial and Applied Mathematics 5,1-2 (2010) 17-37
Mathematics
Numerical Analysis
28 pages, 11 figures. Final revised version accepted for publication
Scientific paper
Recently, a new family of integrators (Hamiltonian Boundary ValueMethods) has been introduced, which is able to precisely conserve the energy function of polynomial Hamiltonian systems and to provide a practical conservation of the energy in the non-polynomial case. We settle the definition and the theory of such methods in a more general framework. Our aim is on the one hand to give account of their good behavior when applied to general Hamiltonian systems and, on the other hand, to find out what are the optimal formulae, in relation to the choice of the polynomial basis and of the distribution of the nodes. Such analysis is based upon the notion of extended collocation conditions and the definition of discrete line integral, and is carried out by looking at the limit of such family of methods as the number of the so called silent stages tends to infinity.
Brugnano Luigi
Iavernaro Felice
Trigiante Donato
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