intl Cauchy integral

## Syntax

    [y]=intl(a,b,z0,r,f)

## Arguments

z0

  a complex number

a, b

  two real numbers

r

  positive real number

f

  "external" function

## Description

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`).

## Examples

    function y=f(z)
      y = z^(3 + %pi * %i)
    endfunction

    intl(1,2,1+%i, 3, f)

## See also

- intc