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**Research Projects**** ****Additional Course Material ****Matlab Code**

**Instructor: **Prof. Daniele Venturi (venturi@ucsc.edu)

**Teaching Assistants: **

- Shadi Haddad, shhaddad@ucsc.edu
- Kenneth Caluya, kcaluya@ucsc.edu

**Main Lectures: **Tu/Th 1:30PM -3:05PM (Remote instruction)

**Discussion Section**: Tuesday 5:20-6:55PM, Physical Sciences, room 114 (hybrid: in-person+remote)

**Group tutoring research projects discussion: **Monday 1:20PM-2:25PM (remote)

**Office Hours:**

- Prof. Daniele Venturi, Friday 10AM-11AM (remote)
- Shadi Haddad, Wednesday 3PM-4PM (remote)
- Kenneth Caluya, Tuesday 11AM-12PM (remote)

**CANVAS COURSE WEBPAGE: CANVAS**

**LECTURE NOTES: PDF**

Grading policy: See CANVAS course webpage

**Purpose of the course: **Many complex phenomena in physics, biology, and engineering can be modeled in terms of nonlinear dynamical systems. The purpose of the course is for students to learn how to extract quantitative and qualitative information from such models.

**Course content: **

Geometric approach, flows on the line, linear and nonlinear stability analysis of fixed points, potential systems, bifurcations (saddle-node, transcritical, pitchfork), normal forms, forward and inverse flow maps.**One-Dimensional Dynamical Systems**-Geometric approach, existence and uniqueness of solutions, linear systems (analytical solution, classification of fixed points), equilibria in nonlinear systems, Hartman-Grobman theorem, center manifolds, conservative systems, reversible systems, index theory, limit cycles (Liénard systems, criteria to rule out closed orbits), Poincaré-Bendixon theorem, Poincare maps, linear stability analysis of periodic orbits, bifurcations (normal form of co-dimension 1 bifurcations, heteroclinic and homoclinic bifurcations, Hopf bifurcations, global bifurcations of cycles).**Two-Dimensional Dynamical Systems**-- Existence and uniqueness of solutions, flow maps, linear systems, Liouville theorem, probability density function equations, Lagrangian and Hamiltonian dynamics, fixed points and stability analysis, center manifolds, bifurcation analysis of equilibria, Hopf bifurcation, Lorenz equations (symmetry, volume contraction, stability analysis of fixed points, trapping region, limit cycles, bifurcation analysis, transient chaos, strange attractor), Lyapunov exponents.*High-Dimensional Dynamical Systems**Discrete Dynamical Systems**-*Examples (Neural networks, Poincaré map, numerical methods for ODEs, Henon map, Newton's method), n-dimensional maps (fixed points, linear stability analysis), one-dimensional maps (cobwebs, logistic map, tent map), analysis of the logistic map, Lyapunov exponents.

**Textbook:** Steven H. Strogatz, ``Nonlinear Dynamics and Chaos'', CRC Press, 2018.

Mitchal Dichter, ``Student solutions manual for nonlinear dynamics and chaos second edition'', CRC press 2019

**Other recommended textbooks**

- L. Perko, ``Differential equations and dynamical systems'', Springer
- R. C. Robinson, ``An introduction to dynamical systems'', American Mathematical Society.
- S. Wiggins, ``Introduction to applied nonlinear dynamical systems'', Springer.
- M. W. Hirsch, S. Smale and R. L. Devaney, ``Differential equations, dynamical systems, and introdution to chaos'', Academic Press
- Y. A. Kuznetsov, ``Elements of applied bifurcation theory'', Springer (PDF)
- S. N. Rasband, ``Chaotic dynamics of nonlinear systems'', Dover.
- J. Guckenheimer and P. Holmes, ``Nonlinear oscillations, dynamical systems and bifurcations of vector fields'', Springer.