@Article{JCM-20-267,
author = {Tang , Yi-Fa},
title = {Symplectic Computation of Hamiltonian Systems (I)},
journal = {Journal of Computational Mathematics},
year = {2002},
volume = {20},
number = {3},
pages = {267--276},
abstract = {<p style="text-align: justify;">We get $τ^6$-terms of the formal energy of the mid-point rule, and use the mathematical pendulum to test the convergence of the formal energy.</p>},
issn = {1991-7139},
doi = {https://doi.org/},
url = {http://global-sci.org/intro/article_detail/jcm/8916.html}
}