Math 2121 (Fall 2021)


Welcome to the homepage for Math 2121: Linear Algebra!

Check out the syllabus here.

Lecture notes

Our lectures this semester will be online at the following times:

New lecture notes will be posted each Friday. Try to read these before class.

Week 1:

Week 2: Week 3: Week 4: Week 5: Week 6: Week 7: Week 8: Week 9: Week 10: Week 11: Week 12: Week 13:

Programming tools

I will be showing some interactive Pluto notebooks in class using the Julia programming language.

You can view these notebooks as static HTML pages, but you are strongly encouraged to install Julia and Pluto in order to run and modify the code in each notebook yourself. This may be useful for exploring ideas, checking problems, and future reference. However, using these programming tools is completely optional and not necessary for the course.

Other resources

The following is our primary textbook:

Some other online resources:


Grades will be computed as follows:


We will have weekly homework assignments. Here are the relevant logistics:

The graded homework assignments are only a bare minimum of preparation for keeping up with the course. It is a good idea to do extra problems, such as the odd numbered exercises in the sections of the textbook corresponding to each lecture. These problems have solutions at the end of the textbook.


We will have a 2-hour, out of class midterm. Email the instructor right away if you need special arrangements, due to a time conflict or being unable to come to campus.

The midterm will cover Lectures 1-12 and HW 1-6.

Review problems and practice exams: Here are solutions to the midterm.


We will have a 3-hour final examination at the end of the term The format will be similar to the midterm.
The exam will be cumulative, covering all lectures and homework.

Review problems: Practice exams: Here are solutions to the final exam.


The following is a tentative course outline, with reading assignments from the textbook.