kronrod_rule_test, a Fortran77 code which calls kronrod_rule(), which computes both a Gauss quadrature rule of order N, and the Gauss-Kronrod rule of order 2*N+1.
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kronrod_rule, a Fortran77 code which computes both a Gauss quadrature rule of order N, and the Gauss-Kronrod rule of order 2*N+1.