关键词: Newton iteration method, root-finding method, fourth-order convergence, numerical test

Abstract: A fourth-order convergence method of solving roots for nonlinear equation,which is a variant of Newton’s method given.Its convergence properties is proved.It is at least fourth-order convergence near simple roots and one order convergence near multiple roots. In the end,numerical tests are given and compared with other known Newton and Newtontype methods.The results show that the proposed method has some more advantages than others.It enriches the methods to find the roots of non-linear equations and it is important in both theory and application. 

Key words: Newton iteration method, root-finding method, fourth-order convergence, numerical test