gl_fast_rule_test, a C code which calls gl_fast_rule(), which carries out the fast computation of the K-th value and weight of an N-point Gauss-Legendre quadrature rule.
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gl_fast_rule, a C code which carries out the rapid computation of the K-th value and weight of an N-point Gauss-legendre quadrature rule, by Ignace Bogaert.