Math 123, Fall 2007

Instructor: Daniel Tataru

Lectures: TuTh 12:30-14:00 am, 4 EVANS

Course Control Number: 54847

Office: 841 Evans, e-mail: tataru@math.berkeley.edu

Office Hours: Monday 1:00-2:00 or by appointment

Prerequisites: Math. 104

Textbook Hirsch, Smale and Devaney, Differential Equations, Dynamical Systems, and an Introduction to Chaos

Syllabus: The course provides a more elementary yet rigorous introduction to Ordinary Differential Equations. We begin with linear systems of equations, first in the plane and then in higher dimension. Then we move on to nonlinear systems and study the existence and uniqueness of solitions, equilibrium and stability, as well as the Poincare-Bendixson theorem. Finally we consider some applications to biology and mechanics. Additional topics will be covered as time permits.

Grading: 40% homeworks, 20% midterm, 40% final.

Homework: Homework for each week will be assigned on the web, and due every Tuesday. The two lowest homework grades will be dropped.

Midterm: Tuesday October 16

Homework assignments:

No:
Due Date:
Problems:
1.
4/9
p.16: 2,3,5,9,11,12
2.
11/9
p.38: 1,2,6,7,8,10
3.
18/9
p.57: 1,2(i)(ii)(iv),4,6,8,9,13
4.
25/9
p.72:1,2,5,6,7
5.
2/10
p.104: 2(c,e),3,5(c,g),8(b),11
6.
9/10
p.135, 1(a,c,f),3,6,8,9,10
7.
30/10
p.156: 1 a,b,d, 2 p. 404: 4 abce, 5
8.
6/11
p.184: 1,2
9.
13/11
p.185: 4,5,6,9
10.
20/11
p. 211: 1(c), 4,5,6
11.
4/12
p. 231:1ad,2,7,8