MATH 215/255 Sections 101 & 104

Ordinary Differential Equations

2015 Fall

Instructor: Dr. Mingfeng Zhao
Office Location: Earth Sciences Building 4122
Office Phone Number: +1(604)-822-2159
Office Hours Location: Leonard S. Klinck Building 300B
Office Hours: Monday&Wednesday: 02:00PM--04:00PM or By Appointment
Class Time:
  • Section 101: Monday&Wednesday&Friday: 08:00AM--09:00AM
  • Section 104: Monday&Wednesday&Friday: 01:00PM--02:00PM
Textbook: Differential Equations for Engineers, Jiri Lebl. You can download this book HERE, or you can buy a paper copy at
Supplementary Textbook: Differential Equations and Their Applications, 4th Edition, Martin Braun. You can download this book HERE when you are inside the UBC. We will follow Braun's section 1.9 for the topic on exact equations.
Contents: Ordinary Differential Equations, First/Second/Higher Order Linear Differential Equations, Laplace Transform, Systems of the First Order Linear Differential Equations, Numerical Methods, Phase Plane Analysis.
Credits: 3
Pre-reqs: One of MATH 101, MATH 103, MATH 105, MATH 121, SCIE 001 and one of MATH 152, MATH 221, MATH 223.
Co-reqs: One of MATH 200, MATH 217, MATH 226, MATH 253, MATH 263.
Last Day to Withdraw without a W standing: September 22, 2015
Last Day to Withdraw with a W standing: October 16, 2015 (course cannot be dropped after this date)
Instructor in Charge: Professor Tai-Peng Tsai


The Common Webpage for Math 215/255

Lecture Notes & Supplements

Homework & Solutions

Exams & Solutions


Please Read the Followings

Piazza: Students are recommended to sign up the Piazza for this course. Students can ask and answer questions in the Piazza.

Piazza Class Link:

Note: I will post all lecture notes, solutions to quizzes and homework, and midterm exams on this website.

Grading: Homework 10%; Two Midterm Exams Each 20%; Final Exam 50%

Homework: There will be 8 homework totally in this semester. Each homework will be assigned and collected on Friday (the first homework will be due on September 25, 2015). Students can work together on homework, but must write up your own work independently. A selection of the problems will be graded, but the completeness will be counted. The lowest score will be ignored.

Midterm Exams: There will be two 50mins midterm exams in class scheduled on October 09, 2015(Friday) and November 13, 2015(Friday).

Final Exam: The final exam will cover all contents in the entire semester. Please avoid making any travel arrangements that would not allow you to take the final at the scheduled time.