Qy. Hu, SUPERCONVERGENCE OF NUMERICAL-SOLUTIONS TO VOLTERRA INTEGRAL-EQUATIONS WITH SINGULARITIES, SIAM journal on numerical analysis, 34(5), 1997, pp. 1698-1707
In this paper we discuss the beta-polynomial discrete collocation meth
od (based on practical meshes) for Volterra integral equations with we
akly singular kernels. It will be shown that superconvergence properti
es may be obtained by using appropriate collocation parameters and by
a simple, cheap postprocessing of the original discrete collocation so
lution.