**MATH 225**

**Spring 2006
Prof. Ken Alexander
**

**Office:** DRB 250, (213) 740-3797

**Email:**
alexandr@usc.edu **Web
Page: ** http://www-rcf.usc.edu/~alexandr/

**Office hours:** Monday 11-12, 1-2; Wednesday 11-12; or by
appointment. Monday 1-2 is in the Math Center (KAP 116); other
office hours are held in my office.

**Teaching Assistant:** Haoyuan Liu

**Text:** *Differential Equations and Linear Algebra*
(2nd Ed.) by Stephen W. Goode

**Homework** will be given approximately weekly. On each
assignment a few selected problems will be graded. It is OK to
help each other solve homework problems, but it's not OK to turn in
essentially identical solutions--once you have discussed homework
problems so that you understand better what to do, you should write the
solutions on your own. Homework will be accepted up to 2
lectures late, with a 20% penalty. Not accepted more than 2
lectures late.

**Quizzes:** There will be two or three quizzes during the
term, in discussion session, typically the week before the exam.
(Exact dates to be announced in lecture.)

**Exams: ** Two midterms plus final. Tentative midterm
dates are Friday February 17 and Wednesday March 29. Final is
Monday May 8, 8:00-10:00 am. The final is cumulative but with
greater emphasis on material after the second midterm.

Final
exam information: The final will be held Monday May 8,
8:00 - 10:00 a.m., in the lecture room (SOS B46). Closed book, no
calculator, but you are allowed one 8 1/2 x 11 sheet (2 sides) of
handwritten notes. An optional review
session with Haoyuan will be held Saturday May 6, 11 a.m. - 3
p.m. in VKC 101. An optional SI
review session with Nitin will be held Monday May 1, 5 p.m. - 8
p.m. in GFS 106.

**Missed exams: ** There will be no makeup exams. In
exceptional cases, with a written excuse, if you miss an exam I will
base your grade on the exams you did take.

**Grading: ** Homework + quizzes 25%, midterms 20% each,
final 35%. No fixed quotas of A’s, B’s etc. The number of points
needed for a particular grade is not fixed in advance--if the exam
turns out to be difficult and scores are low, then fewer points are
needed for an A, for a B, etc.

**Auditing: ** If you want to just sit in on the class, you
must register for an audit.

**Material to be covered:** Parts of Chapter 1; most of
Chapters 3-8. The following schedule is approximate:

3.1 - 3.7 9 lectures

4.4, 4.3
3 lectures

5.1 - 5.7 7 lectures

6.1, 6.3 - 6.7 6 lectures

1.2, 1.6 2 lectures

7.1 - 7.4 5 lectures

8.1 - 8.7 7
lectures

Midterms
2 lectures

Extra time for topics requiring it:
2 lectures

TOTAL 43
lectures

Everything in this syllabus is in principle tentative; if necessary
it will be adjusted during the semester.

**Additional help:** There are TA's in the Math Center Mon. -
Fri., 8 am - 6 pm. Most of them can help you
with Math 225. Also, help is available through Supplemental
Instruction (SI)--details later. The SI leader for this lecture
is
Nitin Sharma. More information about SI is here. Nitin's
sessions (which are completely optional) are held as follows:

Fridays 12:00 - 1:00 in GFS 114