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We get τ6-terms of the formal energy of the mid-point rule, and use the mathematical pendulum to test the convergence of the formal energy.
,SYMPLECTIC COMPUTATION OF HAMILTONIAN SYSTEMS (Ⅰ)
【摘 要】
：
We get τ6-terms of the formal energy of the mid-point rule, and use the mathematical pendulum to test the convergence of the formal energy.
【机 构】
：
LSEC, ICMSEC, Academy of Mathematics and System Sciences, Chinese Academy of Sciences,Beijing,100080
【出 处】
：
计算数学(英文版)
【发表日期】
：
2002年3期
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