arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1811.09802math.NAcs.NAmath.DS
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利用CESTAC方法控制泰勒-内插法求解第一类弱正则积分方程的精度

Control of accuracy on Taylor-collocation method to solve the weakly regular Volterra integral equations of the first kind by using the CESTAC method

iauctb.ac.ir(伊玛目哈梅尼理工大学)

Samad Noeiaghdam, Denis Sidorov, Valery Sizikov

AI总结:

本文研究了如何利用CESTAC方法控制泰勒-内插法求解第一类弱正则积分方程的精度,通过引入CADNA库和收敛定理,验证了新终止准则的有效性,并通过实例展示了数值解的比较。

摘要:

寻找迭代方法的最佳参数和函数是数值分析中的主要问题。为此,采用随机算术(SA)技术来控制泰勒-内插法求解第一类弱正则积分方程(IEs)的精度。因此,应用了CESTAC(Controle et Estimation Stochastique des Arrondis de Calculs)方法,并替代通常的数学软件使用CADNA(Control of Accuracy and Debugging for Numerical Applications)库。此外,展示了所提方法的收敛定理。为了应用CESTAC方法,证明了一个定理,该定理将作为使用新终止准则代替传统绝对误差的许可。通过该定理,可以显示两个连续近似值之间共同显著数字(NCSDs)几乎等于精确解和数值解之间NCSDs。最后,通过基于CESTAC方法的泰勒-内插法解决了一些实例,并展示了基于两种算术的数值解表。通过浮点算术(FPA)对不同ε值进行比较,展示了迭代次数的比较。

英文摘要:

Finding the optimal parameters and functions of iterative methods is among the main problems of the Numerical Analysis. For this aim, a technique of the stochastic arithmetic (SA) is used to control of accuracy on Taylor-collocation method for solving first kind weakly regular integral equations (IEs). Thus, the CESTAC (Controle et Estimation Stochastique des Arrondis de Calculs) method is applied and instead of usual mathematical softwares the CADNA (Control of Accuracy and Debugging for Numerical Applications) library is used. Also, the convergence theorem of presented method is illustrated. In order to apply the CESTAC method we will prove a theorem that it will be our licence to use the new termination criterion instead of traditional absolute error. By using this theorem we can show that number of common significant digits (NCSDs) between two successive approximations are almost equal to NCSDs between exact and numerical solution. Finally, some examples are solved by using the Taylor-collocation method based on the CESTAC method. Several tables of numerical solutions based on the both arithmetics are presented. Comparison between number of iterations are demonstrated by using the floating point arithmetic (FPA) for different values of $\varepsilon$.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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