Bsplines                Computation of a cubic B-spline basis
                        associated to a given vector of knots
D1Bsplines              Computation of the 1st derivative of a cubic
                        B-spline basis associated to a given vector of
                        knots
D2Bsplines              Computation of the 2nd derivative of a cubic
                        B-spline basis associated to a given vector of
                        knots
IBsplines               Computation of the integral of a cubic B-spline
                        basis over (t0,x) for a given vector of knots
trapeze                 Trapeze integration from a vector of function
                        values evaluated at quadrature points
