laguerre_integrands_test, a Fortran90 code which calls laguerre_integrands(), which defines integration problems over semi-infinite intervals of the form [ALPHA,+oo).
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laguerre_integrands, a Fortran90 code which defines test integrands for Gauss-Laguerre quadrature rules for estimating the integral of a function with density exp(-x) over the interval [0,+oo).