**Coordinates**:

Tues, Thurs 11:30-1:00 in BURN-1B36 starting Tuesday 5th September.

Prof Humphries, BH-1112, Tel: 398-3821, E-mail: humphries@math.mcgill.ca

Office Hours: Mon 11:30-12:30, Thurs 1:00-2:00 and by arrangement

**Description**

This is an introductory course on dynamical systems mainly concerned with linear systems and one and two dimensional nonlinear systems of differential equations. We will investigate how to determine the qualitative behaviour of the solutions of these differential equations, without having to determine the actual solutions explicitly (most interesting equations do not have neat closed form solutions). This is an applied mathematics course, and the main focus of the course will be on understanding and explaining the behaviour of solutions to differential equations, as opposed to a pure mathematics course where the focus might be more on stating and proving theorems. The honours version of the course will contain more analytical questions.Topics will include: Linear systems of differential equations, linear stability theory. Nonlinear systems: existence and uniqueness, numerical methods, one and two dimensional flows, phase space, limit cycles, Poincare-Bendixson theorem, bifurcations, Hopf bifurcation, the Lorenz equations and chaos.

**Differences in the Courses**

Math326 is intended primarily for students in majors programs. Math376 is intended for students in Honours programs. The courses share the same lectures, but the assignments, midterm and final exam for math376 will be at a higher level of difficulty and depth. In addition, Math376 Students will have a small take-home project to complete.**References:**

The Textbook for this course is*Nonlinear Dynamics and Chaos*, by Steven H Strogatz.

**Prerequisites:**The course is intended for all students with an interest in nonlinear dynamics, and sufficient mathematical grounding. In the past students have been drawn from across science and engineering as well as mathematics. To that end the prerequisites are- Math 222 or equivalent (Taylor's theorem in particular),
- Math 223 (non-math students), Math 236 (math students), or equivalent (Eigenvalues/eigenvectors in particular).

*matlab*, and students are expected to make some use of computing software such Matlab.**Assignments:**There will be regular assignments (about 7 in the semester) . For Math326 students these will count for 25% of the final mark. For Math376 students these will count for 15% of the final mark.**Project (Math376 only):**A take-home project will be assigned to Math376 students in October and will be worth 10% of the final grade.**Midterm:**The midterm will be in class on (provisionally; subject to room availability) Thursday 26^{th}October, and will be worth 20% of the final mark.**Final Exam:**There will be a formal 3 hour final exam which will count 55% of the final mark.**Policies:**- Make up tests will not be given,
and late homework will not be accepted, except for an
absence approved
*in advance*by the instructor. - Important announcements (including posting of assignments and due dates)
will be made to registered students
by e-mail (via MyCourses)
and/or posted on
**MyCourses**. - I attempt to reply to e-mail in a timely fashion, but do not expect immediate responses. I usually will not reply to email sent the day before a test.

- Make up tests will not be given,
and late homework will not be accepted, except for an
absence approved
**Copyright**

Instructor generated course materials (e.g., handouts, notes, summaries, exam questions, etc.) are protected by law and may not be copied or distributed in any form or in any medium without explicit permission of the instructor. Note that infringements of copyright can be subject to follow up by the University under the Code of Student Conduct and Disciplinary Procedures.**Academic Integrity**

The work you hand in should be your own effort; any collaboration must be acknowledged.

McGill University values academic integrity. Therefore all students must understand the meaning and consequences of cheating, plagiarism and other academic offences under the Code of Student Conduct and Disciplinary Procedures (see www.mcgill.ca/students/srr/honest/ for more information).

**Language**

In accord with McGill University's Charter of Students' Rights, students in this course have the right to submit in English or in French any written work that is to be graded.