# Math 231

(Last updated Monday, December 12 @ 2pm)## Course Information

Instructor: Professor Nicholas Vlamis

Instructor Office: 507 Kiely

Instructor Email: nicholas.vlamis@qc.cuny.edu

Office Hour: Monday 2–3pm (or by appointment)

Textbook: Anton, Howard and Kaul, Anton. Elementary Linear Algebra, twelfth edition. John Wiley & Sons, 2019.

## Week 16 (Week of December 12)

Discussed least-squares solutions to linear systems. Please take a couple of minutes to fill out the course evalution: www.qc.cuny.edu/evaluate

**Final Exam Information:****Date/Time/Location:**Monday, December 18 11am-1pm in Kiely 422 (our usual classroom).**Office Hours:**Thursday 2-3pm and Friday 11am-12pm (in my office: 507 Kiely)

## Week 15 (Week of December 5)

Quiz 11 (our last quiz) will be given in the beginning of class on Wednesday, Dcember 7.

Please take a couple of minutes to fill out the course evalution: www.qc.cuny.edu/evaluate

The passcode issues on the videos for the Markov Chain lectures should be resolved.

Homework #12 (No associated quiz, but content will be on final exam.)

Note: Final Exam is on Monday, December 18 11am-1pm.

## Week 14 (Week of November 28)

Quiz 10 will be given in the beginning of class on Wednesday, November 30.

Please take a couple of minutes to fill out the course evalution: www.qc.cuny.edu/evaluate

Homework #11 (Associated quiz will be on

**Wednesday, December 7**)

## Week 13 (Week of November 21)

Introduced the notion of diagonalizable matrices and how to tell if a matrix is diagonalizable. Homework #10 (Associated quiz will be on

**Wednesday, November 30**)Exam 2 Grading: Add 10 points to your recorded grade

We will not meet in person on Wednesday, November 23 (see video lecture series below).

Lecture on Markov Chains (Combined notes for all parts)

## Week 12 (Week of November 14)

**Exam 2 is on Wednesday, November 16**. Exam 2 will cover Sections 2.1-2.3, 3.1, 3.2, 4.1-4.6, 4.8, and 4.9 from the textbook.

Homework #10 (Associated quiz will be on

**Wednesday, November 30**)

## Week 11 (Week of November 7)

Quiz 9 will be given in the beginning of class on Wednesday, November 9

Note: Exam 2 is on Wednesday, November 16. Exam 2 will cover Sections 2.1-2.3, 3.1, 3.2, 4.1-4.6, 4.8, and 4.9 from the textbook.

No homework this week. Study for the exam! (A homework on eigenvectors will be posted next week.)

Examples of eigenfaces.

## Week 10 (Week of October 31)

Quiz 8 will be given in the beginning of class on Wednesday, November 2

Note: Exam 2 is on Wednesday, November 16. Exam 2 will cover Sections 2.1-2.3, 3.1, 3.2, 4.1-4.6, 4.8, and 4.9 from the textbook.

Homework #9 (Associated quiz will be on

**Wednesday, November 9**)

## Week 9 (Week of October 24)

Quiz 7 will be given in the beginning of class on Wednesday, October 26

Homework #8 (Associated quiz will be on

**Wednesday, November 2**)

## Week 8 (Week of October 17)

Quiz 6 will be given in the beginning of class on Wednesday, October 19

Special Math Department Event: Queens College Mathematical Discovery Series

Homework #7 (Associated quiz will be on

**Wednesday, October 26**)

## Week 7 (Week of October 10)

There was no class on Monday, October 10.

Homework #6 (Associated quiz will be on

**Wednesday, October 19**)

## Week 6 (Week of October 3)

Exam 1 was held on Monday, October 3.

No class Wednesday, October 5 or Monday, October 10 (this is CUNY-wide)

Our next class is on Wednesday, October 12, and we will have a quiz based on Homework #5.

## Week 5 (Week of September 26)

Quiz 4 will be given in the beginning of class on Wednesday, September 28

**We have class on Thursday, September 29 (CUNY will follow a Monday schedule that day)****Exam 1 is on Monday, Oct 3. It will cover Sections 1–9 of Chapter 1. Please read the informations sheet:**Information Sheet for Exam 1

Homework #5 (Associated quiz will be on

**Wednesday, October 12**)

*A proof-by-picture of the fact that the determinant of a 2x2 matrix is the absolute value of the area of the parallelogram determined by its row vectors. *

## Week 4 (Week of September 19)

Quiz 3 will be given in the beginning of class on Wednesday, September 21

**Note:****We have class on Thursday, September 29 (CUNY will follow a Monday schedule that day)****Note:****Exam 1 is in two weeks on Monday, Oct 3. It will cover Sections 1–9 of Chapter 1.**

Homework #4 (Associated quiz will be on

**Wednesday, September 28**)

## Week 3 (Week of September 12)

Quiz 2 will be given in the beginning of class on Wednesday, September 14

Homework #3 (Associated quiz will be on

**Wednesday, September****21**)

## Week 2 (Week of September 5)

**No class Monday, September 5 (Labor Day)**Quiz 1 will be given in the beginning of class on Wednesday, September 7

Syllabus update: your lowest quiz grade will be dropped.

Homework #2 (Associated quiz will be on

**Wednesday, September 14**)

## Week 1 (Week of August 29)

**Reading:**Read Sections 1.1 and 1.2 in the course textbook. Make sure to read the definition of pivot position, pivot row, and pivot column on page 22.

For those interested, the Google example was lifted from Strogatz's book

*The Joy of x*, which has nice examples of math in the real world.Contact Information Form: Please fill out this form so that I have your preferred email address. I will use the address you provide to send out class announcements.

Homework #1 (Associated quiz will be on

**Wednesday, September 7**) ***Updated Wed. Aug. 31 @ 12:30pm