Abstract: | Recently Dolezal and Tewarson 2], and Papamichael and Soares 3] have considered the cubic spline-on-spline for the purpose of the approximating the derivatives y(2),y(3), and y(4). In this paper their ideas have been extended and the quadratic spline-on-spline has been established for the same purpose. This technique yields better results than the traditional process using a single quadratic spline. |