Dettagli sull'Insegnamento per l'A.A. 2016/2017

Prerequisiti

I prerequisiti minimi di questo corso sono: Algebra lineare (sufficiente quanto si fa in un corso del primo anno della triennale di Fisica, Ingegneria o Matematica) ed Equazioni differenziali ordinarie (sufficiente quanto normalmente si fa in un corso di Analisi Matematica II). È inoltre opportuna la conoscenza degli elementi di base di meccanica dei continui (sufficiente quanto normalmente si fa in un corso di Fisica Generale I).

Obiettivi

To render the students able to solve practical problems of bifurcation analysis. To stimulate the emergence of an engineering critical sense in using algorithms of Applied Mathematics finalized to system design.

Sillabo

• LINEAR SYSTEMS OF DIFFERENTIAL EQUATIONS. Exponential of a linear operator, fundamental matrix. Stability for linear systems: stable, unstable and center subspaces. Sinks and sources. Classification of the equilibrium point for a planar linear system: saddles, nodes, foci and centers. Phase portrait in dimension two. Non homogeneous linear systems.
• LOCAL THEORY FOR NON LINEAR SYSTEMS OF DIFFERENTIAL EQUATIONS. Invariant sets. Hyperbolic equilibrium points. Linearization. Stable manifold theorem. Center manifold theorem. TheHartman-Grobman theorem. Hyperbolic equilibrium points for planar systems: saddles, nodes, foci and centers. Stability and Liapunov function. Non hyperbolic equilibrium points for a planar system. Center manifold theory. Normal form theory. Gradient and Hamiltonian systems.
• GLOBAL THEORY FOR NON LINEAR SYSTEMS OF DIFFERENTIAL EQUATIONS. Dynamical systems. Limits sets and attractors. Periodic orbits, limit cycles and separatrix cycles. Homoclinic and heteroclinic orbits. Compound separatrix cycles. Dulac theorem. Poincaré map for a cycle. Poincaré map for a focus. Planar case and Poincaré map. The Stable manifold theorem fo periodic orbits. Floquet theorem. The Center manifold theorem for periodic orbits. Liouvile theorem for the fundamental matrix. Characteristic exponents and multipliers for a period orbit.
• BIFURCATION THEORY Mathematical background: Non-self-adjoint operators, right and left eigenvectors, compatibility condition. Perturbation methods. Eigenvalue sensitivity. The Multiple Scale Method. Basic concepts of bifurcation analysis: Bifurcation points, Linear codimension of a bifurcation, Bifurcations from the Fundamental path. Center Manifold and Normal Form Theories. Basic mechanisms of multiple bifurcations: divergence, Hopf, nonresonant or resonant double-Hopf, Divergence-Hopf, Double-zero bifurcation. Multiple static/dynamic bifurcations: Multiple-Scale Analysis of low-dimensional systems. Bifurcations of general, finite-dimensional, autonomous systems.

Descrittori di Dublino

Alla fine del corso, lo studente dovrebbe

Testi di riferimento

• Lawrence Perko, Differential Equations and Dynamical Systems , Springer. 2001. Third edition (ISBN: 0-387-9516-4)    

Modalità d'esame

Prova scritta e orale

Note

• Si veda anche la pagina sul vecchio sito di ingegneria: http://www.ing.univaq.it/cdl/scheda_corso.php?codice=I2W054

Aggiornamenti alla pagina del corso

• A.A. 2012/2013
• A.A. 2013/2014
• A.A. 2014/2015
• A.A. 2015/2016
• A.A. 2016/2017
• A.A. 2017/2018
• A.A. 2018/2019
• A.A. 2019/2020