The structure of symplectic integrators up to fourth-order can be completely
and analytical understood when the factorization (split) coefficents are
related linearly but with a uniform nonlinear proportional factor. The analytic
form of these {\it extended-linear} symplectic integrators greatly simplified
proofs of their general properties and allowed easy construction of both
forward and non-forward fourth-order algorithms with arbitrary number of
operators. Most fourth-order forward integrators can now be derived
analytically from this extended-linear formulation without the use of symbolic
algebra.
@article{0511031,
author = {Chin, Siu A.},
title = {The Complete Characterization of Fourth-Order Symplectic Integrators
with Extended-Linear Coefficients},
journal = {arXiv},
volume = {2005},
number = {0},
year = {2005},
language = {en},
url = {http://dml.mathdoc.fr/item/0511031}
}
Chin, Siu A. The Complete Characterization of Fourth-Order Symplectic Integrators
with Extended-Linear Coefficients. arXiv, Tome 2005 (2005) no. 0, . http://gdmltest.u-ga.fr/item/0511031/