Integrates over the unit square.
integrate2d(fun, error = 1.0e-5, …)the function to be integrated. The first argument requests the x values, the second the y values, and the remaining are reserved for additional parameters. The integration is over the unit square "[0,1]\^2".
the error bound to be achieved by the integration formula. A numeric value.
parameters passed to the function to be integrated.
integrate2d
returns a list with the $value of the integral over the
unit square [0,1]\^2, an $error estimate and the number
of grid $points used by the integration function.
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