A UNIFORM CONVERGENT SEQUENCE OF SPLINE QUADRATURES FOR CAUCHY PRINCIPAL VALUE INTEGRALS

We propose a new quadrature rule for Cauchy principal value integrals, based on quadratic spline quasi-interpolants, which have an optimal approximation order and satisfy boundary interpolation conditions. In virtue of these spline properties, we can prove uniform convergence for sequences of such quadratures and provide uniform error bounds. A computational scheme for the quadrature weights is given. Some numerical results and comparisons with another spline method are presented. Pubblicato in formato elettronic