The Courant–Friedrichs–Lewy (CFL) Condition : 80 Years After Its Discovery Foreword Stability of Different Schemes Mathematical Intuition: Poincaré Pólya Dewey. Three dimensional Plasma Arc Simulation using Resistive MHD A Numerical Algorithm for Ambrosetti Prodi Type Operators On the Quadratic Finite Element Approximation of 1 D Waves: Propagation Observation Control and Numerical Implementation Space Time Adaptive Mutilresolution Techniques for Compressible Euler Equations A Framework for Late time stiff Relaxation Asymptotics Is the CFL Condition Sufficient Some Remarks Fast Chaotic Artificial Time Integration Appendix A Hans Lewys Recovered String Trio Appendix B Appendix C Appendix D. This volume comprises a carefully selected collection of articles emerging from and pertinent to the 2010 CFL 80 conference in Rio de Janeiro celebrating the 80th anniversary of the Courant–Friedrichs–Lewy (CFL) condition. A major result in the field of numerical analysis the CFL condition has influenced the research of many important mathematicians over the past eight decades and this work is meant to take stock of its most important and current applications. The Courant–Friedrichs–Lewy (CFL) Condition: 80 Years After its Discovery will be of interest to practicing mathematicians engineers physicists and graduate students who work with numerical methods. Contributors: U. Ascher B. Cockburn E. Deriaz M.O. Domingues S.M. Gomes R. Hersh R. Jeltsch D. Kolomenskiy H. Kumar L.C. Lax P. Lax P. LeFloch A. Marica O. Roussel K. Schneider J. Tiexeira Cal Neto C. Tomei K. van den Doel E. Zuazua .