arminstraub.com

# Fall 2019: Differential Equations II (Math 332)

## Overview

 Instructor Dr. Armin Straub MSPB 313 straub@southalabama.edu (251) 460-7262 (please use e-mail whenever possible) Office hours TR, 9am-noon, or by appointment Lecture TR, 2:00-3:15pm, in MSPB 345 Midterm exams The tentative dates for our two midterm exams are: Tuesday, October 1 Tuesday, November 12 Final exam Tuesday, December 10 — 1:00pm-3:00pm Text Fundamentals of Differential Equations and Boundary Value Problems, by R. Kent Nagle, Edward B. Saff, Arthur David Snider (Pearson, 7th Ed., 2018) Online grades USAonline Syllabus syllabus.pdf

## Lecture sketches and homework

To help you study for this class, I am posting lecture sketches. These are not a substitute for your personal lecture notes or coming to class (for instance, lots of details and motivation are not included in the sketches). I hope that they are useful to you for revisiting the material and for preparing for exams.

After most classes, homework is assigned and posted below.

• You should aim to complete the problems right after class, and before the next class meets.
A 15% penalty applies if homework is submitted after the posted due date.
• Homework is submitted online, and you have an unlimited number of attempts. Only the best score is used for your grade.
Most problems have a random component (which allows you to continue practicing throughout the semester without putting your scores at risk).
• Collect a bonus point for each mathematical typo you find in the lecture notes (that is not yet fixed online), or by reporting mistakes in the homework system. Each bonus point is worth 1% towards a midterm exam.
The homework system is written by myself in the hope that you find it beneficial. Please help make it as useful as possible by letting me know about any issues!
Date Sketch Homework
08/20 lecture01.pdf Homework Set 1: Problems 1-2 (due 9/5)
08/22 lecture02.pdf Homework Set 1: Problems 3-7 (due 9/5)
08/27 lecture03.pdf Homework Set 1: Problems 8-9 (due 9/5)
08/29 lecture04.pdf Homework Set 1: Problems 10-11 (due 9/5)
09/03 lecture05.pdf Homework Set 2: Problems 1-4 (due 9/17)
09/05 lecture06.pdf Homework Set 2: Problems 5-8 (due 9/17)
09/10 lecture07.pdf Homework Set 2: Problems 9-11 (due 9/17)
09/12 lecture08.pdf Homework Set 3: Problem 1 (due 10/1)
09/17 lecture09.pdf Homework Set 3: Problems 2-4 (due 10/1)
09/19 lecture10.pdf Homework Set 3: Problems 5-6 (due 10/1)
09/24 lecture11.pdf Homework Set 3: Problems 7-9 (due 10/1)
09/26 review get ready for the midterm:
complete Quiz 1, practice problems and all homework
10/03 lecture12.pdf Homework Set 4: Problems 1-3 (due 10/25)
10/08 lecture13.pdf Homework Set 4: Problems 4-5 (due 10/25)
10/15 lecture14.pdf Homework Set 4: Problems 6-7 (due 10/25)
10/17 lecture15.pdf Homework Set 4: Problems 8-10 (due 10/25)
10/22 lecture16.pdf Homework Set 5: Problems 1-2 (due 11/12)
10/24 lecture17.pdf new problems after next class
complete Quiz 2 and all previous homework
10/29 lecture18.pdf Homework Set 5: Problems 3-5 (due 11/12)
10/31 lecture19.pdf Homework Set 5: Problem 6 (due 11/12)
11/05 lecture20.pdf start preparing for the midterm using the practice problems
(in particular, the new Problem 11)
11/07 review get ready for the midterm:
complete the practice problems and all homework
11/14 lecture21.pdf review midterm (solutions below)
11/19 lecture22.pdf Problems 1-4 in the practice problems:
final-practice.pdf
11/21 lecture23.pdf Problem 5 in the practice problems:
final-practice.pdf
11/26 lecture24.pdf complete the practice problems
12/3 lecture25.pdf get ready for the final exam!
12/5 review get ready for the final exam!

## Exams and practice material

The following material will help you prepare for the exams.