From that page: > In numerical analysis, a quadrature rule is an approximation of the definite integral of a function, usually stated as a weighted sum of func

From that page: > In numerical analysis, a quadrature rule is an approximation of the definite integral of a function, usually stated as a weighted sum of function values at specified points within the domain of integration Simpson's rule, taught in first year calculus, is exact for cubics, with 3 sample points.