摘要: We present a physicist’s approach to integrability and its detection. Starting from specific examples we working definition of what is meant by “integrability”. The detector on which this whole course in based the “Painleve method” links integrable character (differential) system singularity structure solutions. Recent results discrete systems are also discussed here. They are, for major part, obtained through application “singularity confinement” that equivalent Painleve method. Foremost among these equations generalize domain transcendental functions introduced have so many interesting applications nonlinear physics.