Indexed on: 13 Nov '16Published on: 31 Oct '16Published in: Applied Mathematics and Computation
Publication date: 1 March 2017 Source:Applied Mathematics and Computation, Volume 296 Author(s): Wanyuan Ming, Chengming Huang In this paper the existence, uniqueness, regularity properties, and in particular, the local representation of solutions for general Volterra functional integral equations with non-vanishing delays, are investigated. Based on the solution representation, we detailedly analyze the attainable (global and local) convergence order of (iterated) collocation solutions on θ-invariant meshes. It turns out that collocation at the m Gauss (-Legendre) points neither leads to the optimal global convergence order m + 1 , nor yields the local convergence order 2m on the whole interval, which is in sharp contrast to the case of the classical Volterra delay integral equations. However, if the collocation is based on the m Radau II points, the local superconvergence order 2 m − 1 will exhibit at all mesh points. Finally, some numerical experiments are performed to confirm our theoretical findings.