One class of methods for performing this operation takes the sum from one to n of a weighting functiontimes a function and is accurate to degree two n minus one. The number of increments must be a multipleof three in order to use the 3/8 rule for this procedure. That class is named for Gauss. The n equals two caseof the Newton-Cotes formula for this procedure approximates a curve using parabolas, and is calledSimpson's Rule. This procedure can more easily be done with trapezoids or rectangles, when it's called aRiemann 
One class of methods for performing this operation takes the sum from one to n of a weighting functiontimes a function and is accurate to degree two n minus one. The number of increments must be a multipleof three in order to use the 3/8 rule for this procedure. That class is named for Gauss. The n equals two caseof the Newton-Cotes formula for this procedure approximates a curve using parabolas, and is calledSimpson's Rule. This procedure can more easily be done with trapezoids or rectangles, when it's called aRiemann sum. For 10 points, name this procedure used to find the area under a curve.
One class of methods for performing this operation takes the sum from one to n of a weighting functiontimes a function and is accurate to degree two n minus one.
numerical integration [or word forms; or quadrature]