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Convergence analysis on a class of improved Chebyshev methods for nonlinear equations in Banach spaces

机译:Banach空间中一类非线性方程的改进Chebyshev方法的收敛性分析。

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摘要

In this paper, we study the semilocal convergence on a class of improved Chebyshev methods for solving nonlinear equations in Banach spaces. Different from the results for Chebyshev method considered in Hernandez and Salanova (J Comput Appl Math 126:131-143, 2000), these methods are free from the second derivative, the R-order of convergence is also improved. We prove a convergence theorem to show the existence-uniqueness of the solution. Under the convergence conditions used in Hernandez and Salanova (J Comput Appl Math 126:131-143, 2000), the R-order for this class of methods is proved to be at least , which is higher than the ones of Chebyshev method considered in Hernandez and Salanova (J Comput Appl Math 126:131-143, 2000) and the variant of Chebyshev method considered in Hernandez (J Optim Theory Appl 104(3): 501-515, 2000) under the same conditions.
机译:在本文中,我们研究了一类改进的Chebyshev方法的半局部收敛性,用于求解Banach空间中的非线性方程。与Hernandez和Salanova(J Comput Appl Math 126:131-143,2000)中考虑的Chebyshev方法的结果不同,这些方法没有二阶导数,收敛的R阶也得到了改善。我们证明了一个收敛定理,证明了该解的存在唯一性。在Hernandez和Salanova(J Comput Appl Math 126:131-143,2000)中使用的收敛条件下,证明此类方法的R阶至少为,它比在Cn中考虑的Chebyshev方法要高。 Hernandez和Salanova(J Comput Appl Math 126:131-143,2000)和在相同条件下在Hernandez中考虑的Chebyshev方法的变体(J Optim Theory Appl 104(3):501-515,2000)。

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