# Fall 2014 - MATH 215/255 - Section 101

# Ordinary Differential Equations

## Instructor

**Kevin Henriot**

**Office:** Mathematics building, M209

**Email:** khenriot (at) math (dot) ubc (dot) ca

**Office hours:** Monday 2:00-3:30 PM, Thursday 10:30-12:00 AM.

**Office hours room:** Leonard S. Klinck building, LSK300B/LSK300C.

There are replacement office hours for my previous leave this Friday (October 31)
in LSK300 from 9:00 AM to 11:00 AM.
Lecture notes on Chapters 2 and 6 of Lebl's book may be posted online on Saturday.

## Class schedule

We meet on Mondays, Wednesdays and Fridays from 8:00 to 9:00 am,
from September 3 to November 28, in room 201 of the Leonard S. Klinck building.
## Exams

There are two midterms on October 1 and on November 5,
and the final exam will take place on December 15 at 3:30 PM.
For the final exam, if a student has an exam conflict or hardship, he should email me
so that an arrangement may be found with the math department.
An exam hardship is defined as three exams within 24 hours,
and an exam conflict can be two exams at the same time,
a religious holiday, or another serious problem.

Midterm 1 solution.

**Time and location for midterm 2:**
Usual class time/room, that is Wednesday November 5, LSK201, 8:00-8:50 am.

**Content for midterm 2:** In Lebl's book, Chapter 2 on higher-order linear ODEs (except section 2.3)
and Chapter 6 on the Laplace transform (except subsections 6.2.4, 6.3.3, 6.4.4).
A table of Laplace transforms will be made available during the exam.

**Practice exams:**

2009 Midterm 2, solution.

2010 Midterm 2, solution.

## Homework

Homework is due weekly (outside midterm weeks) on Wednesdays, before the beginning of the class.
Please remember to clip your homework and make sure your name is on it before handing it out.

Homework 1, solution, September 17.

Homework 2, solution, September 24.

Homework 3, solution, October 8.

Homework 4, solution, October 15.

Homework 5, solution, October 22.

Homework 6, solution, October 29.

Homework 7 is due November 12.

## Lecture notes

September 15, Lecture 6.

September 17, Lecture 7.

September 19, Lecture 8.

September 22, Lecture 9.

September 24, Lecture 10.

September 26, Lecture 11.

September 29, Lecture 12.
## References

** Official sources:**

Lebl - Differential equations for engineers.
Freely available here.

Braun - Differential equations and their applications, subsection 1.9.
Used for exact equations (see outline).

**Complementary sources:**

Boyce and di Prima - Elementary differential equations and boundary value problems, any edition.

Logan - A first course in differential equations, 2nd edition (an excellent book, more mathematically demanding).

## Resources