Summer 2020
BMSCourse Dynamical Systems
Prof.
Dr. Bernold Fiedler
Recitation sessions:
Dr. Isabelle Schneider
Schedule, Summer 2020
Tuesdays and Thursdays, 10:1512:00
 ONLINE COURSE!
START: Tuesday, April 21 2020, 10:1512:00
Live classes will be attempted on webex. If, and only if, webex fails
miserably, all class materials will be provided for download in two
parts per class, afterwards. Part 1 consists of a concise summary. The
complementary part 2 will discuss each and every step of the summary by
detailed screen and audio recording. It is strongly recommended to go
through part 2 first, to take notes and digest the material at leisure.
Do not procrastinate! Anytime later, and as a reminder, you may prefer
and enjoy the brevity of part 1.
Written exam / Klausur:
There will be a written exam in the form of a takehome exam (häusliche Klausur) on July 14, 1012. Details:
(PDF)
There will be a written exam in the form of a takehome exam (häusliche Klausur) on November 3, 1012. Details:
(PDF)Exam:
(PDF)Consent:
(PDF)
Your points (of the first exam) have been uploaded in the KVV.
The grades are as follows:
Grade:  5.0  4.0  3.7  3.3  3.0  2.7  2.3  2.0  1.7  1.3  1.0 
Points  047  4853  5458  5963  6469  7074  7579  8085  8690  9195  96128 
Pass Criteria
Solve correctly at least 25% of the assignments (see assignments section). Fachbereich and university have not reached a policy concerning final
exams (Klausur), at yet. Information will be provided, in due time. In
case such binding guidance does not become available, in due time,
course credit will be based on active participation, only.
Audience
Students of mathematics or physics, including teachers, from semester 3.
Direct access to thesis projects: bachelor, master, dissertation.
Students interested in dynamical systems are also welcome to participate in the seminar (Hi)stories of Dynamics. Please note that topics will be distributed on April 23, 12 p.m., right after the second session of this course. It will be possible to give your talk in English.
Topics
Dynamical Systems are concerned with anything that moves.
The three semester course takes us on a fascinating mathematical voyage
through the centuries:
from origins in celestial mechanics to contemporary struggles between
chaos and determinism.
Examples include nonlinear oscillators, ecological models, the Lorenz
equation, chemical and metabolic networks, and epidemic models.
Semester 1:
 Flows and differential equations
 First integrals and the nonlinear pendulum
 Examples, examples, examples
 Existence and uniqueness of solutions of ordinary differential
equations
 Linear differential equations
 Omegalimit sets and Lyapunov functions
 Planar flows and the PoincaréBendixson theorem
 Forced oscillations
Assignments
Form teams of two, work on four problems per week, submit at least
two, get one right each week (on average).
Submission procedure: email a .pdf or .jpg file of your solutions to your assigned tutor, before the deadline.
Be prepared to explain any of your solutions (no matter whether your own
or the solution by your team partner!) during any tutorial, live, on
webex.
 Assignment, due 30.04.2020 (PDF)
 Assignment, due 07.05.2020 (PDF)
 Assignment, due 14.05.2020 (PDF)
 Assignment, due 21.05.2020 (PDF)
 Assignment, due 28.05.2020 (PDF)
 Assignment, due 04.06.2020 (PDF)
 Assignment, due 11.06.2020 (PDF)
 Assignment, due 18.06.2020 (PDF)
 Assignment, due 25.06.2020 (PDF)
 Assignment, due 02.07.2020 (PDF)
 Assignment, due 09.07.2020 (PDF)
Tutorials
Mondays 1012, Tuesdays 1214, and Wednesdays 1618, starting on April 27. Please check the Whiteboard page for information on the online rooms.
References
 K.T. Alligood, T.D. Sauer and J.A. Yorke:
Chaos,
Springer, 1997.
 H. Amann:
Ordinary Differential Equations,
de Gruyter, 1990.
 V.I. Arnold:
Ordinary Differential Equations,
Springer, 2001.
 V.I. Arnold:
Geometrical Methods in the Theory of Ordinary Differential Equations,
Springer, 1988.
 W.E. Boyce and R.C. DiPrima:
Elementary Differential Equations and Boundary Value Problems,
Wiley, 5th edition, 1992.
 S.N. Chow and J.K. Hale:
Methods of Bifurcation Theory,
Springer, 1982.
 E.A. Coddington and N. Levinson:
Theory of ordinary differential equations,
McGillHill, 1955.
 P. Collet and J.P. Eckmann:
Concepts and Results in Chaotic Dynamics. A Short Course,
Springer, 2006.
 R. Devaney, M.W. Hirsch and S. Smale:
Differential Equations, Dynamical Systems, and an Introduction to Chaos,
Academic Press, 2003.
(This is the updated version of
M.W. Hirsch and S. Smale:
Differential Equations, Dynamical Systems, and Linear Algebra,
Academic Press, 1974.)
 Dynamical Systems I,
D.K. Anosov and V.I. Arnold (eds.),
Encyclopaedia of Mathematical Sciences Vol 1,
Springer, 1988.
 J. Hale:
Ordinary Differential Equations,
Wiley, 1969.
 B. Hasselblatt, A. Katok:
A First Course in Dynamics,
Cambridge 2003.
 P. Hartmann:
Ordinary Differential Equations,
Wiley, 1964.
 A. Katok, B. Hasselblatt:
Introduction to the Modern Theory of Dynamical Systems,
Cambridge 1997.
 F. Verhulst:
Nonlinear Differential Equations and Dynamical Systems,
Springer, 1996.
 E. Zeidler: Nonlinear Functional Analysis and its Applications, Volume 1: FixedPoint Theorems, Springer, 1998.
Dynamical Systems I: basic questions
This is the list of questions for the whole semester, and you should be able to answer all of them only at the end of the course.
