greenIntegrallab

The app bundles six complementary modules. Adaptive Simpson recursion automatically concentrates work where the integrand bends sharply, reporting an estimated error budget alongside the function evaluation count. The singular-integral workflow layers an optional lower-endpoint square-root change of variables before composite Simpson quadrature, which is ideal for integrable blow-ups near a boundary. For higher-dimensional problems, tensor-product Simpson cubature integrates smooth scalar fields over rectangular domains in two or three dimensions with user-controlled grid density.