For some HW assignments, you may choose between 3 formats:

1.) Online HW. Log into Webwork for your HW problems. Note if you have difficulty with a problem, click on e-mail instructor to send an e-mail describing the issue.

WebWork instructions (pdf), (doc format without comments).

2.) Paper version. Make sure you show all work.

3.) A combination of the above. Sometimes you might not be able to find that annoying addition error. If you know how to do the problem, but can't get it correct on Webwork, turn in a paper version of that problem. Note also that on exams, you will be graded based on the work shown for the problem. If you would like your work graded on a HW problem, please turn in a paper version. Make sure to include, the problem number, the statement of the problem as well as the work you want graded. You can turn in either your individualized problem or the same problem number from the pdf/paper version.

On paper HW, you are required to check your answers when possible. If your answer is wrong, clearly indicate this on your HW. If you do not indicate this, you will receive 0 credit.

Note a homework or quiz grade below 93% strongly correlates with failing this class. When I taught this course in Spring 2014:

36.2% earned less then 93% on their homework. Of the students who earned less than 93% on their homework,
17.6% earned B's, 29.4% earned C's, 11.8% earned D's, 41.2% earned F's.

63.8% earned more than 93% on their homework. Of the students who earned more than 93% on their homework,
46.6% earned A's, 40% earned B's, and 13.3% earned C's.

Similar correlations held for quiz grades.


HW 1: Do one of the following:

1.) Online Webwork HW 1 (due date Thursday 9/4 at 11:59pm).
Note: Your user name = Your uiowa user name, but your password is your 8 digit HawkID (not your uiowa password). You should change your password after you log in.

2.) Paper Version of HW 1. Please check your answers (due date Friday 9/5 at 11am, slide under my office door, B1H MLH or turn in early during class).

3.) A combination of the above (but you should do all 26 problems). Online part due 9/4 at 11:59pm. Paper version due 9/5 at 11am -- slide under my office door or turn in early during class.

Click here for hints on HW 1 problems 4 - 10.


HW 2 (due beginning of class Wednesday, 9/10)

Outline or summarize ALL of the following:

1.) HW 1 hints
2.) Class lecture given Wednesday 9/3
3.) Class lecture given Monday 9/8

The two lectures listed above cover basic important material. Studies show that re-writing your course notes shortly after class is a great way to learn that days material and can save you time in the long run. Thus you will be required to do that for the above 2 lectures (and the HW 1 hints) to see if this study method works for you. There are no requirements as to how you do the summaries, only that you do one for each of the above. For example, pictures of lines and planes (even if poorly done) might be your preferred method for summarizing HW 1 hints. You should do what works best for you. If you discover you have questions over the course material as you write the summaries, e-mail me (idarcybiomath+33 AT gmail.com or isabel-darcy AT uiowa.edu) and I will answer them via e-mail or in class.


HW 3 Do one of the following:

1.) Online Webwork HW 3 (due date Thursday 9/11 at 11:59pm).
Note: Your user name = Your uiowa user name, but your password is your 8 digit HawkID (not your uiowa password). You should change your password after you log in.

2.) Paper Version of HW 3. Please check your answers (due date Friday 9/12 at 11am, slide under my office door, B1H MLH or turn in early during class).

3.) A combination of the above (but you should do all 15 problems). Online part due 9/11 at 11:59pm. Paper version due 9/12 at 11am -- slide under my office door or turn in early during class.


HW 4 Do one of the following:

1.) Online Webwork HW 4 (due date Thursday 9/18 at 11:59pm).
Note: Your user name = Your uiowa user name, but your password is your 8 digit HawkID (not your uiowa password). You should change your password after you log in.

2.) Paper Version of HW 4. Please check your answers (due date Friday 9/19 at 11am, slide under my office door, B1H MLH or turn in early during class).

3.) A combination of the above (but you should do all 22 problems). Online part due 9/18 at 11:59pm. Paper version due 9/19 at 11am -- slide under my office door or turn in early during class.

If you turn in any paper HW, please put your section number on your HW


HW 5 Do one of the following:

NOTE: While HW 5 is not due until after exam 1, I STRONGLY recommend that you finish HW 5 BEFORE exam 1.

1.) Online Webwork HW 5 (due date Thursday 9/25 at 11:59pm).
Note: Your user name = Your uiowa user name, but your password is your 8 digit HawkID (not your uiowa password). You should change your password after you log in.

2.) Paper Version of HW 5. Please check your answers (due date Friday 9/26 at 11am, slide under my office door, B1H MLH or turn in early during class).

3.) A combination of the above (but you should do all 6 problems). Online part due 9/25 at 11:59pm. Paper version due 9/26 at 11am -- slide under my office door or turn in early during class.

If you turn in any paper HW, please put your section number on your HW


HW 6 Do one of the following:

1.) Online Webwork HW 6 (due date Thursday 10/9 at 11:59pm).

2.) Paper Version of HW 6. Please check your answers (due date Friday 10/10 at 11am, slide under my office door, B1H MLH or turn in early during class).

3.) A combination of the above (but you should do all 22 problems). Online part due 10/9 at 11:59pm. Paper version due 10/10 at 11am -- slide under my office door or turn in early during class.

If you turn in any paper HW, please put your section number on your HW


HW 7 Do one of the following:

1.) Online Webwork HW 7 (due date Thursday 10/16 at 11:59pm).

2.) Paper Version of HW 7. Please check your answers (due date Friday 10/17 at 11am, slide under my office door, B1H MLH or turn in early during class).

3.) A combination of the above (but you should do all 27 problems). Online part due 10/16 at 11:59pm. Paper version due 10/17 at 11am -- slide under my office door or turn in early during class.

If you turn in any paper HW, please put your section number on your HW


HW 8 Do one of the following:

1.) Online Webwork HW 8 (due date Thursday 10/23 at 11:59pm).

2.) Paper Version of HW 8. Please check your answers (due date Friday 10/24 at 11am, slide under my office door, B1H MLH or turn in early during class).

3.) A combination of the above (but you should do all 18 problems). Online part due 10/23 at 11:59pm. Paper version due 10/24 at 11am -- slide under my office door or turn in early during class.

If you turn in any paper HW, please put your section number on your HW


Ch 5 (& 6) Quizzes related to Exam 3 (and the final exam). All online HW and quizzes are due 11:59pm on the due dates stated below. Note all videos are posted on ICON.

Many quizzes and HW's due dates were postponed in case you had questions you couldn't get answered. Thus there are 4 quizzes and 1 HW (Eigen3, Diagonalization1, Diagonalization2, RequiredQuizReviewForExam3, Webwork HW9fall14) due Thursday Nov 20th. Most of you have finished most of the problems, but if you have any questions, please let me know. I'll even consider additional extensions, but I don't recommend getting too far behind.

Each time you click on "take * test", a new version is created. We will take the highest grade over all versions of the same quiz as your grade for that quiz.

Complete eigen0 before watching videos: Due 11/6 eigen0

Due 11/6 (Based on Video 1 Eigenvalues part 1 [11 minutes]) : Eigen1

(Based on Video 2 Finding eigenvectors [26.5 minutes] & Video 3 Eigenvalues: Algebraic vs. Geometric Multiplicity [11 minutes]) :
Due 11/10: Eigen2
Actual Due date Thursday 11/20, Suggested, but fake due date Monday 11/10: Eigen3

See HW9fall14 for questions related to Video 4
Actual Due date Thursday 11/20, Suggested, but fake due date Sunday 11/16 (Based on Video 5 Diagonalization [27 minutes] and Mon 10/10 class)
Diagonalization1
New Due date Friday 11/21: Diagonalization2
See ICON for hints.

Due Friday 11/21: RequiredQuizReviewForExam3 For the first 4 problems, recall that the eigenspace is a vector space so it is closed under linear combinations.
You will need to use estimation for problem 5 (but you only need to estimate d_11.
The last 4 problems ask you to determine multiplicity given the characteristic polynomial, so these should be quick.

Due date Thursday 12/4: RequiredQuizReviewForExam3Part2

NOTE: While RequiredQuizReviewForExam3Part2 is not due until after exam 3, I STRONGLY recommend that you finish HW11 BEFORE exam 3. The only reason it is due after exam 3 is to avoid overloading webwork. Several students had issues with webwork when I had homework due the same day as the exam. I have no control over the webwork server, so I strongly recommend starting HW early.


HW 9 (Based on Video 4 Eigenvalue/Eigenvector Review [22 minutes] and Wed 10/29 class)

Video 4 reviews almost all important concepts for finding eigenvalues/eigenvectors. It includes a nice example of calculating the characteristic polynomial when the matrix is not so nice. The main thing it misses is a reminder that
0 is an eigenvalue of A if and only if
Ax = 0 has an infinite number of solutions if and only if
A is NOT invertible.

Do one of the following:

1.) Actual Due date Friday 11/21, Suggested, but fake due date Thursday 11/13: Webwork HW9fall14

2.) Paper Version of HW 9. Please check your answers (due date Friday 11/21 at 11am).

3.) A combination of the above (but you should do all 8 problems). Online part due 11/21 at 11:59pm. Paper version (due date Friday 11/21 at beginning of class).


HW 10 Do one of the following:

1.) Actual Due date Monday 12/1, Suggested, but fake due date Thursday 11/20 Webwork HW10fall14

2.) Paper Version of HW 10. Please check your answers (due date Monday 12/1 at beginning of class).

3.) A combination of the above (but you should do all 8 problems). Online part due 12/1 at 11:59pm. Paper version (due date Monday 12/1 at beginning of class).


HW 11

NOTE: While HW 11 is not due until after exam 3, I STRONGLY recommend that you finish HW11 BEFORE exam 3. The only reason it is due after exam 3 is to avoid overloading webwork. Several students had issues with webwork when I had homework due the same day as the exam. I have no control over the webwork server, so I strongly recommend starting HW early.

Do one of the following:

1.) Actual Due date Thursday 12/4, Suggested, but fake due date Thursday 11/20 Webwork HW11fall14

2.) Paper Version of HW 11. Please check your answers (due date Friday 12/5 at 11am, slide under my office door, B1H MLH or turn in early during class).

3.) A combination of the above (but you should do all 5 problems). Online part due 12/4 at 11:59pm. Paper version (due date 12/5 at 11am, slide under my office door, B1H MLH or turn in early during class).


Information about Exam 3: NOTE new location of tonight's review SH 140

Review/problem session:
NEW Location: SH 140
Times: Monday, Dec 1, 7:30pm 8:45 pm and Tuesday Dec 2, 6:00pm - 7:20 pm.

Exam 3 will be in class Wednesday Dec 3. Exam 3 will have a similar format to Exam 1 (see below). I have created 44 practice problems to help you study for exam 3 as described below. Note answers in pdf format are available (which may be particularly helpful for the 3 select true statement problems containing multiple parts). Some solutions also include explanations.

Part 1 (34%) of exam 3 will consist of problems where you have to show your work.
To prepare for part 1, I have created OptionalExam3WrittenSectionReview (22 problems) in 3 different formats:

  • quiz format: OptionalExam3WrittenSectionReviewQuizFormat
  • HW format: OptionalExam3WrittenSectionReview
  • pdf format including ANSWERS

    Note for exam 3, I can modify the above by combining problems (e.g. asking for characteristic equation, mulitplicity, defectiveness, along with calculating e.values, e.vectors, and/or diagonalization). Or I might ask you to complete just part of a problem (e.g., I could ask you to diagonalize but give you characteristic equation or e.vectors, or Av for several v, etc.. Or for Gram-Schmidt or QR factorization, some of the vectors might already be orthogonal).

    Part 2 will consist of 11 multiple choice worth 6 points each including True/False.
    To prepare for part 2, I have created QuizReviewForExam3part2 (22 problems) in 3 different formats:

  • quiz format: RequiredQuizReviewForExam3part2 (NOTE this is REQUIRED).
  • HW format: NOTRequiredJustHWformatOfQuizReviewForExam3part2
  • pdf format including ANSWERS
  • Note in some problems, you will need to estimate WITHOUT a calculator. Note you can see answers for the pdf version (which may help with other versions). Some solutions also include explanations. Make sure you understand each problem as I can modify them as I have done before.


    After exam 3

    HW 12: Note these problems actually come from chapter 5 and can thus be done anytime.

    Do one of the following:

    1.) Due date Thursday 12/11:Webwork HW12fall14

    2.) Paper Version of HW 12. Please check your answers (due date Friday 12/12 at 11am, slide under my office door, B1H MLH or turn in early during class).

    3.) A combination of the above (but you should do all 4 problems). Online part due 12/11 at 11:59pm. Paper version (due date Friday 12/12 at 11am, slide under my office door, B1H MLH or turn in early during class).


    Last Quiz

    Due date Thursday 12/11: ShortRequiredFinalQuiz_


    Information about Final Exam:

    Our final exam will Thursday 12/18, 12:30p - 02:30p Location: LR1 VAN

    I will have office hours Monday 3:30 - 4:30pm and Wednesday TBA, Thursday 10:40 - noon and by appointment.

    All review sessions will be held in 118 MLH (with the exception of moving to a smaller room after 8pm on Wednesday -- see below) Review session times:

  • Saturday, Dec 13, 3:15pm 5:15 pm in 118 MLH
  • Wednesday Dec 17, 1:00pm - 2:50 pm in 118 MLH
  • Wednesday Dec 17, 6:00pm - 7:50 pm in 118 MLH
  • and then move to
  • Wednesday Dec 17 8:00pm - 8:50pm in B13 MLH (smaller room)
  • We cannot get a room for Wed evening 7pm - 8:80pm as it cuts across 2 exam times. Thus I have changed the time to 6:00pm - 7:50pm, but I have also reserved a smaller room B13 MLH from 8 -8:50pm Wed Dec 13. Also our Wednesday reservations for 118 MLH actually end on the half-hour, but I expect we should be able to stay until 2:50 and 7:50 even though our reservation officially ends at 2:30 and 7:30 -- but if someone needs time to set up for an exam after us, we may need to divide the transition time with them).

    Optional (unless you want to pass this class) reviews for Final

    section 7.2 optional Problems: webwork, pdf, answers

    Practice Problems for the Written Section

  • FinalExamOptionalReviewWritten (44 problems): HW format         pdf,         Answers to pdf
  • If you would like quiz format for the above, please let me know.

    Since section 3.3 was not covered on any of the exams, but will appear on the final exam, I put these problems first. Note there are additional problems from section 3.3 on the multiple choice practice problems.

    Practice Problems for the Multiple Choice Section

    Multiple choice practice problems can appear on either the written or the multiple choice part of the final exam

  • Final Exam Optional Review Multiple Choice Problems Medium length (58 problems): HW format         pdf,         Answers to pdf
  • Final Exam Optional Review Multiple Choice Problems (134 problems including the 58 problems in the above link): HW format         pdf,         Answers to pdf
  • If you would like quiz format for the above, please let me know.


    Older set of multiple choice problems (also includes a few written-type problems, but is missing important HW 12 problems)

  • OptionalFinalExamReviewMultChoiceLongForm (140 problems): HW format Quiz Format, pdf, Answers
  • The above is under construction, but you are welcome to work on these optional problems as they become available.