Journal
JOURNAL OF COMPUTATIONAL AND APPLIED MATHEMATICS
Volume 201, Issue 1, Pages 300-313Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cam.2006.02.021
Keywords
the first kind Abel integral equation; quadrature method; asymptotic expansion; extrapolation
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This paper presents high accuracy mechanical quadrature methods for solving first kind Abel integral equations. To avoid the ill-posedness of problem, the first kind Abel integral equation is transformed to the second kind Volterra integral equation with a continuous kernel and a smooth right-hand side term expressed by weakly singular integrals. By using periodization method and modified trapezoidal integration rule, not only high accuracy approximation of the kernel and the right-hand side term can be easily computed, but also two quadrature algorithms for solving first kind Abel integral equations are proposed, which have the high accuracy O(h(2)) and asymptotic expansion of the errors. Then by means of Richardson extrapolation, an approximation with higher accuracy order O(h(3)) is obtained. Moreover, an a posteriori error estimate for the algorithms is derived. Some numerical results show the efficiency of our methods. (c) 2006 Published by Elsevier B.V.
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