arminstraub.com

# Fall 2015: Linear Algebra I (Math 237)

## Overview

 Instructor Dr. Armin Straub ILB 313 straub@southalabama.edu (251) 460-7262 (please use e-mail whenever possible) Office hours MW, 10:00-11:55am, and TR, 10:50-11:55am, or by appointment Lecture TR, 9:30-10:45am, in ILB 345. Midterm exams The dates for our two midterm exams are: Thursday, October 1 Thursday, November 12 Final exam Thursday, December 10 — 10:30am-12:30pm Text Linear Algebra with Applications, by Jeffrey Holt (W. H. Freeman, 2013) Syllabus syllabus.pdf

## Homework and lecture sketches

There is two kinds of homework.

• The graded homework needs to be turned in on the due date at the end of class.
• The study problems are posted for your benefit but they are not turned in. You are strongly encouraged to have a look at these after each lecture to make sure that you are in good shape. You don't necessarily have to work through all of these problems in full detail but you should make sure that you understand the problems and know how to solve them.

To further 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.

Date Sketch In the book Study problems Graded homework
08/18 lecture01.pdf Section 1.1 finish Example 10 none
08/20 lecture02.pdf Sections 1.1/1.2 Section 1.2: 1,3,11,13,19,31,35
also, read the final part of the lecture sketch
homework01.pdf
due: Thursday, Aug 27, in class
08/25 lecture03.pdf Sections 1.1/1.2 Section 1.2: 5-10,23,29 posted on Thursday
08/27 lecture04.pdf Sections 1.1/1.2 Section 1.1: 33,35,37 homework02.pdf
due: Thursday, Sep 3, in class
09/01 lecture05.pdf Section 2.1 Section 2.1: 5,9,11,27,29 posted on Thursday
09/03 lecture06.pdf Section 2.2 Section 2.2: 9,11,12 (solution); finish last example in lecture sketch homework03.pdf
due: Thursday, Sep 10, in class
09/08 lecture07.pdf Section 3.2 Section 3.2: 3bc,5ac,19,23; finish last example in lecture sketch posted on Thursday
09/10 lecture08.pdf Sections 2.3/3.2 Section 3.2: 5; Section 2.3: 15,18; do last example in lecture sketch from scratch homework04.pdf
due: Thursday, Sep 17, in class
09/15 lecture09.pdf Section 2.3 Section 2.3: 3,5,7 posted next Tuesday
09/17 lecture10.pdf Sections 2.3/3.3 Section 2.3: 19,21,23,25,27 posted next Tuesday
09/22 lecture11.pdf Section 3.3 Section 3.3: 1,3,7,9 homework05.pdf
due: Tuesday, Sep 29, in class
09/24 lecture12.pdf Section 3.3 prepare for the exam using the practice problems: midterm01-practice.pdf, midterm01-practice-solution.pdf none
09/29 lecture13.pdf review get ready for the exam! none
10/06 lecture14.pdf Sections 4.1-4.3 read the lecture sketch, enjoy Fall break! none
10/13 lecture15.pdf Sections 4.1-4.3 Example 107 (e) and (f) in lecture sketch posted on Thursday
10/15 lecture16.pdf Sections 4.1-4.3 Section 4.2: 11,13,15,17,19,21 homework06.pdf
due: Thursday, Oct 22, in class
10/20 lecture17.pdf Sections 4.1-4.3 Section 4.3: 1,3,5,7 (only column and row space) posted on Thursday
10/22 lecture18.pdf Sections 4.1-4.3 Section 4.3: 1,3,5,7,13,15 homework07.pdf
due: Thursday, Oct 29, in class
10/27 lecture19.pdf Sections 4.1-4.3 Section 4.3: 17,19,27,33 posted on Thursday
10/29 lecture20.pdf Sections 4.1-4.3 Section 4.1: 1,3,5,7,9,11,13,17,19 homework08.pdf
due: Thursday, Nov 5, in class
11/3 lecture21.pdf Sections 4.1/5.2 Section 4.1: 65,67; go through Examples 130, 131 in the sketch posted on Thursday
11/5 lecture22.pdf Sections 5.1/5.2 prepare for the exam using the practice problems: midterm02-practice.pdf, midterm02-practice-solution.pdf none
11/10 Q&A review get ready for the exam! none
11/17 lecture23.pdf Sections 5.2/5.1 Section 5.2: 19,23,25; Section 5.1: 11,15,17 posted on Thursday
11/19 lecture24.pdf Section 6.1 Section 6.1: 3,21,23,25 homework09.pdf
due: Thursday, Dec 3, in class
11/24 lecture25.pdf Section 6.1 Section 6.1: 17,19,27,29 posted last Thursday
12/01 lecture26.pdf Section 3.5 Section 3.5: 47,49,51 posted last Thursday
12/03 Q&A review prepare for the exam using the practice problems: final-practice.pdf, final-practice-solution.pdf none

In case you have not yet obtained your copy of the book (you should!) you can find scanned pages containing the study problems from the corresponding section here: 2.1, 2.2, 2.3, 3.2

## Solutions to homework

The solutions to the study problems can be found at the end of the book.
(In case you have not yet obtained your copy of the book (you should!) you can find the solutions in these scanned pages.)

Below are solutions to the graded homework. Please compare these solutions with your own (if you made a mistake I might have marked it; however, due to a lack of time, I am mostly checking for completeness only and likely missed mistakes of a more subtle nature). If you have any questions, as always, please let me know!

## Exams and practice material

There will be two in-class midterm exams and a comprehensive final exam. Notes, books, calculators or computers are not allowed during any of the exams.

Our exam schedule is:

• Midterm Exam 1: Thursday, October 1
• Midterm Exam 2: Thursday, November 12
• Final Exam: Thursday, December 10 — 10:30am-12:30pm