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An Implicit Method for Numerical Solution of Singular and Stiff Initial Value Problems

机译:奇异初值初值问题数值解的隐式方法

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An implicit method has been presented for solving singular initial value problems. The method is simple and gives more accurate solution than the implicit Euler method as well as the second order implicit Runge-Kutta (RK2) (i.e., implicit midpoint rule) method for some particular singular problems. Diagonally implicit Runge-Kutta (DIRK) method is suitable for solving stiff problems. But, the derivation as well as utilization of this method is laborious. Sometimes it gives almost similar solution to the two-stage third order diagonally implicit Runge-Kutta (DIRK3) method and the five-stage fifth order diagonally implicit Runge-Kutta (DIRK5) method. The advantage of the present method is that it is used with less computational effort.
机译:提出了一种隐式方法来解决奇异初值问题。该方法比隐式Euler方法以及二阶隐式Runge-Kutta(RK2)(即隐式中点规则)方法要更简单一些,并且可以解决某些特殊的奇异问题。对角隐式Runge-Kutta(DIRK)方法适用于解决刚性问题。但是,这种方法的推导和利用都是费力的。有时,它对两阶段的三阶对角隐式Runge-Kutta(DIRK3)方法和五阶段的五阶对角隐式Runge-Kutta(DIRK5)方法提供几乎相似的解决方案。本方法的优点是使用它的计算量较小。

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