Comparison of Iterative Methods for the Calculation of nth Roots Three iterative methods for calculation of nth roots (including one proposed by the author) are compared in two ways: (1) Theoretical convergence estimates are given. (2) A new macrocompiler which estimates machine running time is used to compare the running time of the three methods for a variety of input data. CACM March, 1961 Traub, J. F. CA610302 JB March 17, 1978 12:45 AM 319 5 380 380 5 380 380 5 380 380 5 380 380 6 380