# Summer 2014

Scissor-tailed Flycatcher (Tyrannus forficatus). If you drive down East Lindsey Street on a summer evening, you will probably see a few of these birds perching on fences and telephone wires. Once while I was mowing our lawn, a scissor-tail came and sat nearby on a fence to watch, perhaps interested in the grasshoppers being scared up. This image taken from birdforum.net.

Instructor: John Albert
Office: PHSC 1004
Office hours: Mondays, Tuesdays, and Thursdays from 12:30 to 1:30 pm (or by appointment)
Phone: 325-3782
E-mail: jalbert@ou.edu

## Announcements

• Review sheet for the third exam.
• Solutions to the second exam.
• Review sheet for the second exam.
• Solutions to the first exam.
• Review sheet for the first exam.
• Syllabus for this course.

## Homework

In the list below, bold numbers refer to the exercise sets at the ends of the sections in the text. So "1.2: 4, 7, 9, 11" means problems 4, 7, 9, and 11 from Exercise Set 1.2 at the end of Section 1.2 (on page 13).

## Problems

1 Wednesday, May 14 1.2: 4, 7, 9, 11; 1.3: 4, 9, 15.
2 Friday, May 16 2.1: 8, 11, 13, 16, 40, 48, 52; 2.2: 6, 24, 26, 28, 36, 46.
3 Monday, May 19 2.3: 6, 7, 23, 29, 38, 42; 3.1: 3, 7, 12, 32.
4 Wednesday, May 21 3.1: 25(a-d), 28, 31; 3.2: 2, 16, 17, 26, 27, 40, 43; 3.3: 10, 14, 33, 34.
5 Friday, May 23 4.1: 19, 28, 29 (if you already did #29 in class you don't need to resubmit it), 52, 57, 58.
6 Wednesday, May 28 4.2: 16, 24; 4.3: 22, 28, 33, 34; the two questions on this handout; and (for 4 points): prove that if m is an integer and m is greater than or equal to 4, then m^2 - 4 is composite.
7 Monday, June 2 4.3: 44, 48; 4.4: 14, 15, 17, 24, 44.
8 Wednesday, June 4 4.5: 10; 4.6: 5, 7, 20, 25, 29. Redo 4.4 #24, corrected as follows: Prove that for all integers m and n, if m mod 5 = 2 and n mod 5 = 3, then mn mod 5 = 1. Extra credit: 4.6 #35.
9 Friday, June 6 4.8: 13, 15, 21.
10 Monday, June 9 5.2: 5, 7, 11, 13.
11 Wednesday, June 11 5.2: 2; 5.3: 5, 9, 17, 20.
12 Monday, June 16 5.4: 9; 5.6: 29; 6.1: 3.
13 Wednesday, June 18 6.1: 6, 16(a), 25, 27(a, c, d), 30, 33; 6.2: 7, 16, 26.
14 Friday, June 20 7.1: 2, 13, 17, 25, 42, 43; 7.2: 12, 15, 20, 22.
15 Monday, June 23 7.3: 9, 16, 18.
16 Wednesday, June 25 8.2: 1, 2, 13, 18; 8.3: 2, 21, 26, 29.