# Classical Algebra (Math 326) Assignments

#### Fall Semester, 2002

Assignments are listed by the date due.

PDF and DVI (requires TeX software) versions of this page are available for printing.

Most of these assignments are simply exercises designed to prepare you for the quizzes and the written assignments. Those which are to be submitted as written assignments are so labeled. While you may find it helpful to discuss the exercises with others, no collaboration is permitted on the written assignments.

Wed., Dec18:

Final Exam 3:30 - 5:30

Wed., Dec. 11:

Review Session: bring questions.
Expect a short quiz.

Mon., Dec. 9:

Written assignment No. 5 (also available as PDF or DVI) is due.

Fri., Dec. 6:

Exercises:
417: 8, 10, 12
421: 9
424: 1, 5, 6, 9, 12

Wed., Dec. 4:

Exercises:
350: 10
356: 6, 10
361: 5
416: 3, 5, 7
421: 1, 3, 7

Mon., Dec. 2:

Exercises:
307: 9, 12 - 14
309: 2(ii, iii), 3
350: 2, 4, 6 - 8
356: 2, 5
416: 2

Wed, Fri., Nov. 27, 29:

Recess

Mon., Nov. 25:

Written assignment No. 4 (also available as PDF or DVI) is due.

Fri., Nov. 22:

Exercises:
263: 7, 10
304: 4 - 6
309: 2(i)

Expect a pop quiz.

Wed., Nov. 20:

Exercises:
258: 6
262: 5, 6
303: 1 - 3

Mon., Nov. 18:

Exercises:
249: 14
251: 8, 9
257: 1 - 3
262: 1 - 4

Fri., Nov. 15:

Exercises:
249: 8 - 10, 12
250: 2
251: 4, 5

Wed., Nov. 13:

Exercises:
246: 2, 4
248: 6, 7
251: 7
• Find the smallest positive primitive root modulo the prime 503.
• What is the pattern of repetition in the base 8 “decimal” expansion of each of the rational numbers 17/60 and 13369/32704 ? In each case notice that the base is not coprime to the denominator. Compare these patterns of repetition with the patterns of repetition for the powers of 8 modulo each of the denominators of the two given rational numbers.

Mon., Nov. 11:

Written assignment No. 3 (also available as PDF or DVI) is due. In regard to the fourth problem, an ASCII Chart (also available as PDF or DVI) will be helpful to those who are previously unfamiliar with ASCII codes.

Fri., Nov. 8:

Exercises:
243: 5, 8
246: 1
163: 18
• What is the pattern of repetition in the decimal expansion of the rational number 11/91 ?
• Find the smallest positive primitive root modulo the prime 89.

Wed., Nov. 6:

Exercises:
234: 3
236: 5
238: 7, 9
241: 1
243: 6, 7

Mon., Nov. 4:

Exercises:
169: 6
200: 7, 9, 10, 11
233: 1, 2

Fri., Nov. 1:

Exercises:
163: 14, 16, 17
169: 5
196: 3

Wed., Oct. 30:

Exercises:
158: 3, 4
163: 10, 12, 13
166: 2
169: 4

Mon., Oct. 28:

Exercises:
141: 16
145: 12, 13
147: 4
154: 3
158: 1, 2

Fri., Oct. 25:

Exercises:
138: 10, 13, 14
141: 3 - 7
144: 8, 9
147: 2

Wed., Oct. 23:

Exercises:
123: 13, 15, 17
125: 5, 6
136: 2, 3, 8, 9

Mon., Oct. 21:

Exercises:
89: 5 - 7
121: 1 - 3, 5, 7
125: 3

Fri., Oct. 18:

Midterm Test

Wed., Oct. 16:

Review Session: Bring questions.

Mon., Oct. 14:

Written Assignment No. 2:
1. Find all solutions that are incongruent (mod 10) of each of the following congruences:

1. 17 x EQUIV 1 (mod 10).

2. 47 x EQUIV 25 (mod 10).

3. 14 x EQUIV 43 (mod 10).

4. 53 x EQUIV 74 (mod 10).

5. 15 x EQUIV 55 (mod 10).

2. Let a, b, and c be integers with not both a, b zero. Prove that if there is an integer point (r, s) on the line

 a x + b y  =  c  ,
then there is one and only one integer point (x, y) on the line for which
 0 <= x < {b}/{gcd(a, b)}  .

Please remember that written assignments must be typed.

Fri., Oct. 11:

Exercises:
73: 2
84: 5
86: 1, 3, 4
89: 1 - 3

Wed., Oct. 9:

Exercises:
70: 6
72: 3, 5, 6
74: 5 - 7
84: 1, 3, 4

Mon., Oct. 7:

Exercises:
67: 8
70: 1 - 3
72: 1
73: 1

Fri., Oct. 4:

Exercises:
23: 1 - 3
24: 1, 2
54: 30
65: 6
67: 5, 6, 9

Wed., Oct. 2:

Revised office hours:
Mon & Thurs. 3:30 - 4:30
or by appointment.

Exercises:

54: 25, 26, 29
65: 2, 3, 5

Mon., Sep. 30:

Written assignment No. 1 (also available as PDF or DVI) is due.

Fri., Sep. 27:

Prepare for a short quiz.
Begin working on the written assignment that is due Monday.

Wed., Sep. 25:

Exercises:
35: 11
52: 9, 13
53: 19, 20, 21
55: 1

Mon., Sep. 23:

Exercises:
35: 8, 21
45: 2
50: 4
51: 3

Fri., Sep. 20:

Exercises:
35: 7
45: 1
50: 3

Wed., Sep. 18:

Prepare for a 5 point quiz covering material through the last assignment.

Exercises:

29: 6(v)
33: 4(iv)
35: 5

Mon., Sep. 16:

Recess: no class

Fri., Sep. 13:

Do the ff. exercises:
27: 6
27: 7
29: 3
29: 6(iii)
33: 4(ii)

Wed., Sep. 11:

Scan: Chs 1, 2
Read: §§ 3 A, B, C
Do the ff. exercises:
Evaluate the continued fraction [3, 7, 15, 1, 292]
= 3 + 1/(7 + 1/(15 + 1/(1 + 1/292))) .
Find the continued fraction of the rational number 355/113 .
26: 4
28: 1

Note regarding 9/11 observance: Professor David Janower of the Music Department will conduct the Mozart Requiem with Albany Pro Musica as part of a worldwide “Rolling Requiem” at 8:30 a.m. in the Amphitheater at the Hudson Riverfront. For more information, see http://www.rollingrequiem.org/.

Our class will meet at the normal time.

Mon., Sep. 9:

Recess: no class

Fri., Sep. 6:

Read the first four sections of the supplementary material on continued fractions (also available as PDF or DVI).

If you wish to enter the writing intensive division of the course (Math 326Z), please be sure to submit the required essay (also available as PDF or DVI) at this class (or earlier).