Cet ouvrage est consacrA(c) aux points fixes d'applications
diffA(c)rentiables, aux zA(c)ros de systA]mes non-linA(c)aires et A
la mA(c)thode de Newton. Il s'adresse A des A(c)tudiants de
mastA]re ou prA(c)parant l'agrA(c)gation de mathA(c)matique et A
des chercheurs confirmA(c)s. La premiA]re partie est consacrA(c)e A
la mA(c)thode des approximations successives et confronte un point
de vue AsystA]mes dynamiquesA (thA(c)orA]mes de Grobman-Hartman, de
la variA(c)tA(c) stable) A des exemples issus de l'analyse
numA(c)rique. La seconde partie de cet ouvrage expose la mA(c)thode
de Newton et ses dA(c)veloppements les plus rA(c)cents (thA(c)orie
alpha de Smale, systA]mes sous ou sur-dA(c)terminA(c)s). Elle
prA(c)sente une nouvelle approche de ce sujet et un ensemble de
rA(c)sultats originaux publiA(c)s pour la premiA]re fois dans un
ouvrage de langue franAaise.
This is an advanced text on fixed points, zeros of nonlinear
systems and the Newton method. Its first part, devoted to fixed
points, includes the Grobman-Hartman and the stable manifold
theorems. The second part describes the Newton method from a modern
point of view: Smale's alpha theory, underdetermined and
overdetermined systems of equations. These results are illustrated
by various examples from numerical analysis.
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