25 February 2008 12:06:41.089 PM INT_EXACTNESS_CHEBYSHEV1 FORTRAN90 version Investigate the polynomial exactness of a Gauss-Chebyshev type 1 quadrature rule by integrating weighted monomials up to a given degree over the [-1,+1] interval. INT_EXACTNESS_CHEBYSHEV1: User input: Quadrature rule X file = "cheby1_o2_x.txt". Quadrature rule W file = "cheby1_o2_w.txt". Quadrature rule R file = "cheby1_o2_r.txt". Maximum degree to check = 5 Spatial dimension = 1 Number of points = 2 The quadrature rule to be tested is a Gauss-Chebyshev type 1 rule ORDER = 2 Standard rule: Integral ( -1 <= x <= +1 ) f(x) / sqrt ( 1 - x^2 ) dx is to be approximated by sum ( 1 <= I <= ORDER ) w(i) * f(x(i)). Weights W: w( 1) = 1.570796326794897 w( 2) = 1.570796326794897 Abscissas X: x( 1) = 0.7071067811865475 x( 2) = -0.7071067811865475 Region R: r( 1) = -1.0000000000000000 r( 2) = 1.0000000000000000 A Gauss-Chebyshev type 1 rule would be able to exactly integrate monomials up to and including degree = 3 Error Degree 0.0000000000000003 0 0.0000000000000000 1 0.0000000000000000 2 0.0000000000000000 3 0.3333333333333334 4 0.0000000000000000 5 INT_EXACTNESS_CHEBYSHEV1: Normal end of execution. 25 February 2008 12:06:41.094 PM