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There was an error in my solution to problem 9 (b) on Homework Set 9: I originally said that all three poles were inside  the given circle.  Actually, only the two poles 0 and 1 + i are inside.  Hence from the Residue Theorem the correct value of the contour integral should be π/2 + (π/2) i.

I’ve uploaded a corrected version of the solutions to the Math 421 UDrive.

In case you lost credit on #9 (b) because of my error, please bring your paper with you to the exam Tuesday and I’ll fix it.

(If I marked that problem as correct because of my mistake, you need not show me your paper to get any credit deducted!)

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## End-of-semester information

### Office hours

Monday 13 December 2:00–4:00 p.m., my LGRT 1335G office.

You may pick up your graded Homework 9, or any previously uncollected exam or homework paper.

### Homework 9 solutions

Complete solutions have been uploaded to the usual UDrive location.

There were some too-common errors made in Homework 9 solutions, especially some conceptual errors. Please see this list of common errors there.

### Final Exam

• Reminder that the Final Exam Tuesday (at 8:00 a.m.) is in our usual classroom, LGRT 219
• I’ve posted a list of the additional Final Exam topics—the ones since Exam 2. Lists of topics from Exams 1 and 2 are there, too.
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## HW9: due Fri 10 Dec

Homework 9 (the last one!) is due at the start of class Friday 10 December.

See the Homework page for a link to the list of problems.

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## HW8: due Mon 22 November

Homework 8 is due at the start of class Monday 22 November. See the Homework page for the list of problems.

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## HW 6 & 7 answers available

Solutions to Homework 6 and Homework 7 are available, as usual, from the UDrive folder about which you were e-mailed.

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## HW 7: due Wed 17 Nov

Homework set 7 is now posted to the Homework page. It is due at the start of class on Wednesday 17 November.

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## HW 6: due Mon 8 Nov

See the Homework page for the Homework 6 assignment.

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## Homework 5 solutions

Homework 5 solutions are provided in the form of two files:

• 421f05hw5ans.pdf—solutions to #1–9
• StereographicProjection (HW 5#10).pdf

These solutions are available, as usual, on the Math 421 UDrive, whose log-in information was e-mailed to you earlier.

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## Homework 4 solutions

Solutions to Homework 4 are available for download from the Math 421 U-drive folder.

For this set the solutions are in two non-overlapping files:

• For #1–3: 421f10hw4Ans1to3.pdf — an evaluated pdf version of the notebook 421f10hw4Ans1to3.nb;
• For #4–7: 421f10hw4ans4to7.pdf — a pdf file
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## Homework 5 due Fri 22 Oct

Homework 5 is now posted on the Homework page. It is due in class Friday 22 October.