Linear Algebra

Fall 2020

http://www.math.columbia.edu/~bayer/F20/LinearAlgebra

Section 001

Tuesdays and Thursdays, 8:40am - 9:55am

Zoom meeting

Section 002

Tuesdays and Thursdays, 10:10am - 11:25am

Zoom meeting

Zoom meeting invitations are posted on the Courseworks page for your section, and require a Columbia University Zoom account.

Dave Bayer

Office Hours

dbayer@barnard.edu

Directory of Classes |
Mathematics

CourseWorks

Student Services Online

Including our final, there will be a total of three exams. Course grades will be determined by these exams and graded homework:

**Homework**(10%)**Exam 1**(30%), October 2 and 5**Exam 2**(30%), November 6 and 9**Final**(30%)

Makeup exams will only be given under exceptional circumstances.

Exams 1 and 2 will be take home-exams. You will have Friday and Monday to complete each exam. The exams will be open-book, but you are to work alone. All resources on my web site will be available. Other resources such as office hours and teaching assistants will not be available.

After each of these exams is returned to you, I will schedule a 20 minute meeting to ask you to explain your exam answers. 75% of your exam grade will be based on your written work, and 25% of your exam grade will be based on your oral answers. Please write exam answers showing all of your work, with clear presentations so that you can understand your answers.

I have not yet decided on the format for our final exams.

I receive emails at both dbayer@barnard.edu and bayer@math.columbia.edu.

In general, one should use a work email address for work communications. In college, you should write professors using your university email address. Otherwise your message could be classified as spam, and go unread. If your university email address is not your uni, then please include your uni in your message.

In my case, I use Sanebox to prioritize my email, and I’ve whitelisted Barnard and Columbia email addresses to give them top priority.

Assistance with linear algebra is available from the Columbia Help Room. Here is its current schedule.

I will include information here about our teaching assistants and preceptors once they are assigned.

This page hosts PDF files from this semester and previous semesters:

In Fall 2016, Columbia Disability Services videotaped my linear algebra course:

Here are some resources others have found helpful:

*Linear Algebra with Applications, 5/E*,
by Otto Bretscher.
Pearson, 2012.
ISBN-10: 0321796977,
ISBN-13: 9780321796974.
Columbia University Bookstore,
Amazon, or
Addall.

*Linear Algebra with Applications, 4/E*,
by Otto Bretscher.
Pearson, 2009.
ISBN-10: 0136009263,
ISBN-13: 9780136009269.
Amazon,
or Addall.

The most recent edition of Bretscher is the text required by our department for Linear Algebra.

Homework assignments will be distributed as PDF files. They will serve as exam preparation, and will not taken from Bretscher. Therefore, I will have no direct way of knowing which edition, if any, of Bretscher that you obtain. I will recommend chapters to read from Bretscher, but students have found many alternative resources online that serve their needs, supplementing or replacing this text.

I nevertheless urge you to *read* as much linear algebra as possible. To have
confidence in your understanding, you need
to be able to decipher references to linear algebra in more advanced
textbooks, after our course. My examinations test your computational
abilities; I aim to provide an intuitive grasp of theory that makes sense of
these computations. To be able to easily read linear algebra later, one needs
to practice reading linear algebra now. I have no practical way to test that
you have been reading linear algebra; this is your responsibility.

October 8, 2020 is the last day to drop a class, for Barnard College, Columbia College, Graduate School of Arts & Sciences, School of General Studies, School of Professional Studies. Check with your school’s academic calendar to confirm the dates that apply to you.

University Academic Calendar

Barnard Academic Calendar

This calendar gives our schedule of classes and exams:

Monday |
Tuesday |
Wednesday |
Thursday |
Friday |

7 Sep |
8 |
9 |
10 |
11 |

14 Sep |
15 |
16 |
17 |
18 |

21 Sep |
22 |
23 |
24 |
25 |

28 Sep |
29 |
30 |
1 Oct |
2 Exam 1 |

5 Oct Exam 1 |
6 |
7 |
8 |
9 |

12 Oct |
13 |
14 |
15 |
16 |

19 Oct |
20 |
21 |
22 |
23 |

26 Oct |
27 |
28 |
29 |
30 |

2 Nov |
3 |
4 |
5 |
6 Exam 2 |

9 Nov Exam 2 |
10 |
11 |
12 |
13 |

16 Nov |
17 |
18 |
19 |
20 |

23 Nov |
24 |
25 |
26 |
27 |

30 Nov |
1 Dec |
2 |
3 |
4 |

7 Dec |
8 |
9 |
10 |
11 |

14 Dec |
15 |
16 |
17 |
18 |