Communications of the ACM,
Vol. 12 No. 12, Pages 675-677
The downhill method is a numerical method for solving complex equations ƒ(z) = 0 on which the only restriction is that the function w = ƒ(z) must be analytical. An introduction to this method is given and a critical review of relating literature is presented. Although in theory the method always converges, it is shown that a fundamental dilemma exists which may cause a breakdown in practical applications. To avoid this difficulty and to improve the rate of convergence toward a root, some modifications of the original method are proposed and a program (FORTRAN) based on the modified method is given in Algorithm 365. Some numerical examples are included.
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