# 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.

I am away (at mathematical conferences) from October 1 to October 10.
The midterm will still take place and the lectures will be covered
by Uriya First.
There are no office hours during this period, but I will answer
all your questions by email.

## 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 between November 29 and December 17.

**Time and location for midterm 1:**
Usual class time/room, that is Wednesday October 1, LSK201, 8:00-8:50 am.

**Content for midterm 1, October 1:** In terms of the course outline,
the midterm covers all of Part 1 on first order ODEs,
and Part 2 up to and including constant-coefficient second-order linear ODEs in the case of real roots.
This corresponds to lectures 1-10, and to section 0.0 to just before 2.2.1 in Lebl's book,
together with Braun's notes on exact equations.

**Recommended preparation for midterm 1:**
understanding the theory from the lecture notes and textbooks,
doing/redoing exercises from homeworks 1--3 and the course textbooks,
attempting the practice exams from 2009 and 2010
(note: these sometimes covered more topics than this year).

2009 Midterm 1, solution.

2010 Midterm 1, solution.

## Homework

Homework is due weekly (outside midterm weeks) on Wednesdays, before the beginning of the class.

Homework 1, solution, September 17.

Homework 2, solution, September 24.

Homework 3 is due on October 8.
## 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