Cauchy integral
[y]=intl(a,b,z0,r,f)
:z0 a complex number : :a, b two real numbers : :r positive real number : :f “external” function :
If f is a complex-valued function, intl(a,b,z0,r,f) computes the integral of f(z)dz along the curve in the complex plane defined by z0 + r.*exp(%i*t) for a<=t<=b .(part of the circle with center z0 and radius r with phase between a and b).