The smoothness of solutions for quasilinear systems is one of the most important problems in modern mathematical physics. This book deals with regular or strong solutions for general quasilinear second-order elliptic and parabolic systems. Applications in solid mechanics, hydrodynamics, elasticity and plasticity are described. The results presented are based on two main ideas: the universal iterative method, and explicit, sometimes sharp, coercivity estimates in weighted spaces. Readers are assumed to have a standard background in analysis and PDEs.Weak solutions and the universal iterative process.- Regularity of solutions for non degenerated quasilinear second order elliptic systems of the divergent form with bounded nonlinearities.- Some properties and applications of regular solutions for quasilinear elliptic systems.- Diffeentiability of solutions for second order elliptic systems.- Regularity of solutions for parabolic systems with some applications.- The Navier-Stokes system; strong solutions.Springer Book ArchivesDE