
This book shows the importance of studying semilocal convergence in iterative methods through Newton's method & addresses the most important aspects of the Kantorovich's theory including implicated studies Kantorovich's theory for Newton's method used techniques of functional analysis to prove the semilocal convergence of the method by means of the well-known majorant principle To gain a deeper understanding of these techniques the authors return to the beginning & present a deep-detailed approach of Kantorovich's theory for Newton's method where they include old results for a historical perspective & for comparisons with new results refine old results & prove their most relevant results where alternative approaches leading to new sufficient semilocal convergence criteria for Newton's method are given The book contains many numerical examples involving nonlinear integral equations two boundary value problems & systems of nonlinear equations related to numerous physical phenomena The book is addressed to researchers in computational sciences in general & in approximation of solutions of nonlinear problems in particular