Min Chen

Professor of Mathematics, Purdue University

MA 30400: Differential Equations and Analysis of Boblinear Systems for Engineering and the Sciences

Instructor: Dr. Min Chen

Office: MATH 418
Office Hours: WF 3:30-4:30pm
or by appointment;

Email: chen45@purdue.edu

TA: Mr. Can Cui

Mailbox location: MATH ???

Email: cui147@purdue.edu



Text Books:

Elementary Differential Equations and Boundary Value Problems, 10th edition, by Boyce-DiPrima, Wiley, (required).


There are two night midterm exams and a comprehensive final exam. Calculators, books and notes are not allowed during the exams.

Important Dates Test 1 Sep. 26, 6:30pm-7:30pm, Math175
Test 2 Nov. 1, 6:30pm-7:30pm, Math175
Final Exam TBA

Grading Policy:

Your course grade will be determined as follows: 15% from each mid-term exam, 30% from the final exam, 20% from online homework, 10% from the handgraded homeworks and 10% from quizs.

Tentative Class Schedule (starts on 8/20/18) and homeworks

Hand graded homeworks are due at beginning of the classes on Mondays. When there is no class on Monday, it will be due on Wed.. Online homeworks' due date are posted online. There are about 5 quizes and the dates will be announced during the semester.

Week # Sections Hand graded HW
Week 1 5.1, 5.2 5.2: 14(a)(b)
Week 2 5.3, 5.4 5.4: 11
Week 3 labor day, 5.5, 5.6 5.5: 6 Part(c)(d) only need to find the first three terms of each series solution
Week 4 7.1, 7.2, 7.3 7.3: 25
Week 5 7.4, 7.5 7.5: 18
Week 6 Review Test 1
Week 7 7.6, 7.7 7.6: 7
Week 8 7.8, 7.9 7.9: 5 (Initial condition x(1)=(0, 0))
Week 9 9.1, 9.2, 9.3 9.2: 15(a), 21(a)
Week 10 9.4, 9.5 9.5: 13(a)(b)
Week 11 Review Test 2
Week 12 10.1, 10.2, 10.3 10.1:15
Week 13 10.4, 10.5 10.5: 8, bonus: detailed solution of Test 2
Week 14 10.6 Thanksgiving
Week 15 10.6, 10.7 10.6: 10(a)(b) (Value of alpha for copper is in Table 10.5.1)
Week 16 10.8, Review
Week 17 Final Exam Final Exam

Regrades or late homework:

If you disagree with the grading on a homework, you must provide a written explanation, including your reasons for disagreeing, and resubmit the work for regrading within one week after the work is first returned to the class. If you have an approved late homework, you can submit the late homework with attached written explanation to TA.


Integrity: Academic integrity is expected of all students at all times in this course. You are free (even encouraged) to work with other students to solve the homework problems (talking about math may seem really geeky, but it can make learning the subject much easier and more fun). However, you are required to write up solutions to each assignment using your own words and explanations. Of course, you are required to do your own work on each exam (although you can prepare with others).

Make-up Policy:

There will be no make-up exams except in extreme circumstances (such as: death in immediate family, military obligation, etc.) at the discretion of the instructor. The instructor has to be informed IN ADVANCE by e-mail. You will be asked to provide proper documentation.


Class attendance is expected and I'll "spot check" attendance throughout the semester. I may deduct up to 3% of your grade if you miss more than two of those random checks.

Emergency Preparedness:

In the event of a major campus emergency, course requirements, deadlines and grading percentages are subject to changes that may be necessitated by a revised semester calendar or other circumstances beyond the instructor's control. The primary way to get information about changes in this course is via this webpage and the course Blackboard page. Learn more at https://www.purdue.edu/ehps/emergency_preparedness/