A Method for Locating Zeros of Complex Functions A method for computing the index, or winding number, is developed and applied to the problem of finding zeros of functions from the plane into the plane. CACM April, 1966 Cain Jr., G. L. CA660411 JB March 3, 1978 10:23 AM 1438 5 1438 1438 5 1438 1438 5 1438