SUBJECT
Dynamical systems and differential equations
lecture + practical
master
6+3
Semesters 1-4
Autumn/Spring semester
Topological equivalence, classification of linear systems. Poincaré normal forms, classification of nonlinear systems. Stable, unstable, centre manifolds theorems, Hartman - Grobman theorem. Periodic solutions and their stability. Index of two-dimensional vector fields, behaviour of trajectories at infinity. Applications to models in biology and chemistry. Hamiltonian systems. Chaos in the Lorenz equation.
Bifurcations in dynamical systems, basic examples. Definitions of local and global bifurcations. Saddle-node bifurcation, Andronov-Hopf bifurcation. Two-codimensional bifurcations. Methods for finding bifurcation curves. Structural stability. Attractors.
Discrete dynamical systems. Classification according to topological equivalence. 1D maps, the tent map and the logistic map. Symbolic dynamics. Chaotic systems. Smale horseshoe , Sharkovski’s theorem. Bifurcations.
L. Perko, Differential Equations and Dynamical systems, Springer