Generalization of Hensel's lemma: Finding the roots of p-adic Lipschitz functions

In this paper we consider the problem of finding the roots of p-adic functions. In the case, where the function is defined by a polynomial with integer p-adic coefficients, using Hensel's lifting lemma helps us find the roots of the p-adic function. We generalize Hensel's lifting lemma for a wider class of p-adic functions, namely, the functions which satisfy the Lipschitz condition with constant p(alpha), alpha >= 0, in particular, the functions of this class may be non-differentiable. The paper also presents an iterative procedure for finding approximate (in p-adic metric) values of the root of p(alpha)-Lipschitz functions, thus generalizing the p-adic analogue of Newton's method for such a class of functions. (C) 2015 Elsevier Inc. All rights reserved.