\contentsline {section}{\numberline {1.}Introduction}{2} \contentsline {subsection}{\numberline {1.1.}Chaos --- the dynamical systems approach}{2} \contentsline {subsection}{\numberline {1.2.}Conservative dynamical systems}{4} \contentsline {subsection}{\numberline {1.3.}Dissipative dynamical systems}{4} \contentsline {subsection}{\numberline {1.4.}Spatio-temporal chaos}{7} \contentsline {subsection}{\numberline {1.5.}I want dynamics --- Why study numerics?}{7} \contentsline {section}{\numberline {2.}Dynamical systems}{8} \contentsline {subsection}{\numberline {2.1.}A one-dimensional map}{9} \contentsline {subsection}{\numberline {2.2.}A one-dimensional diffeomorphism}{10} \contentsline {subsection}{\numberline {2.3.}A dissipative two-dimensional diffeomorphism}{10} \contentsline {subsection}{\numberline {2.4.}An area-preserving diffeomorphism}{10} \contentsline {subsection}{\numberline {2.5.}A two-dimensional continuous-time dynamical system}{11} \contentsline {subsection}{\numberline {2.6.}An infinite-dimensional continuous-time dynamical system}{12} \contentsline {subsection}{\numberline {2.7.}One- and $1\frac {1}{2}$-degree of freedom Hamiltonian systems}{12} \contentsline {subsection}{\numberline {2.8.}$N$-body Hamiltonian systems}{13} \contentsline {section}{\numberline {3.}Forward vs.\ backward error}{13} \contentsline {subsection}{\numberline {3.1.}Forward \& backward error and dynamical systems}{14} \contentsline {section}{\numberline {4.}Attractors and dimensions}{15} \contentsline {subsection}{\numberline {4.1.}Approximation of attractors}{15} \contentsline {subsection}{\numberline {4.2.}Fractals and approximating dimensions}{17} \contentsline {subsection}{\numberline {4.3.}Other estimates of dimension \& their relationships}{18} \contentsline {subsection}{\numberline {4.4.}Amount of data}{19} \contentsline {subsection}{\numberline {4.5.}Time-series and embeddings}{19} \contentsline {subsection}{\numberline {4.6.}Random or chaotic?}{23} \contentsline {section}{\numberline {5.}Stable, unstable \& centre subspaces \& manifolds}{24} \contentsline {subsection}{\numberline {5.1.}Computing the stable and unstable subspaces}{25} \contentsline {subsection}{\numberline {5.2.}Equations for the stable manifold}{26} \contentsline {subsection}{\numberline {5.3.}Stable and unstable manifolds for maps and diffeomorphisms}{27} \contentsline {subsection}{\numberline {5.4.}Stable and unstable manifolds for periodic orbits}{27} \contentsline {subsection}{\numberline {5.5.}Hyperbolicity for attractors}{28} \contentsline {subsection}{\numberline {5.6.}Non-hyperbolic fixed points --- centre manifolds}{29} \contentsline {section}{\numberline {6.}Lyapunov exponents}{31} \contentsline {subsection}{\numberline {6.1.}Computing Lyapunov exponents}{32} \contentsline {section}{\numberline {7.}Continuation and bifurcation}{34} \contentsline {subsection}{\numberline {7.1.}Bifurcation jargon}{34} \contentsline {subsection}{\numberline {7.2.}Some basic bifurcations}{35} \contentsline {subsection}{\numberline {7.3.}Continuation}{37} \contentsline {subsection}{\numberline {7.4.}Applications of continuation}{38} \contentsline {subsection}{\numberline {7.5.}Continuation techniques}{39} \contentsline {subsection}{\numberline {7.6.}When a path meets a bifurcation\dots }{40} \contentsline {section}{\numberline {8.}Inertial manifold theory}{40} \contentsline {subsection}{\numberline {8.1.}Technical ideas}{42} \contentsline {subsection}{\numberline {8.2.}Approximate inertial manifolds}{43} \contentsline {section}{\numberline {9.}Finding shadows}{43} \contentsline {subsection}{\numberline {9.1.}Why shadowing can be done}{44} \contentsline {subsection}{\numberline {9.2.}Numerical methods for shadows}{46} \contentsline {subsection}{\numberline {9.3.}Shadowing autonomous ODEs}{46} \contentsline {section}{\numberline {10.}Concluding remarks}{46} \contentsline {section}{References}{49} \contentsline {section}{Index}{54}