Function cauchy_integral 

pub fn cauchy_integral(
    f: impl Fn(Complex) -> Complex,
    contour: &[Complex],
) -> Complex

Compute the Cauchy contour integral ∮ f(z) dz along a polygonal contour.

The contour is given as a sequence of vertices; the integral is computed using the trapezoidal rule over the straight segments connecting them. The contour is automatically closed (last vertex connected back to first).

Arguments

• f - analytic function to integrate
• contour - ordered list of waypoints on the contour (polygonal path)

Returns

Approximation of the contour integral.