Fall 1998 Math?Computer Science 261 at Lehigh University
This is the home page for Fall 1998 Math/Computer Science 261, Discrete Structures at Lehigh University. For now all I will list is homeworks. For other class information contact Garth Isaak at gisaak@lehigh.edu.- Homework 1
- Do 1.2 #1,3,10,19,20
- Due 9-2 1.2 #4,22
- Homework 2
- Do 1.3 #5,7,13,15,19(b)(e)(g)
- Due 9-4 (delayed to 9-7) 1.2 #20,28
- Homework 3
- Do 1.3 #21,25,34,37
- Due 9-7 1.3 #38
- Homework 4
- Do 1.4 #1,4,7,21,23
- Due 9-9 1.4 #22
- Homework 5
- Do Chapter 1 supplementary exercise #1,5,7,9,21,27,31
- Homework 6
- Do 2.1 # 3,8ab,9ab,11,13
- Due 9-16 2.1 # 12
- Homework 7
- Do 2.2 # 3, 17
- Due 9-18 2.2 #10 and 2.3 # 4
- Homework 8
- Do 2.4 # 1,7,15
- Due 9-21 2.4 # 14
- Homework 9
- Do Chapter 2 supplementary exercises # 3(b),6,11,15
- Homework 10
- Do 4.1 #1(b),1(c),1(d)
- Due 9-25 4.1 #2(a)
- Homework 11
- Do 4.1 #9,11,23
- Due 9-28 4.1 #10
- Homework 12
- Do 4.1 #2(b),2(c) and 4.2 #1
- Due 9-30 4.1 #8
- Homework 13
- Do 4.3 #4,5
- Homework 14
- Do 4.3 #10,11
Exam 1 Wednesday October 7 in class
- Homework 15
- Due 10-16; solve (x= 2 mod 5, x = 1 mod 6, x=4 mod 7) using the chinese remainder theorem
- Homework 16
- Do: evaluate 17+21*3 using modular arithmetic (mod5,mod6,mod7) and the chinese remainder theorem
- Homework 17
- Do: Using RSA with n =pq = 2*11 and e=7 encode M=12 and decode M=16
- Do: evaluate 3^33 mod 25 without using a calculator
- Homework 18
- Do 4.4 #1a,1b,2a,3,5,11
- Homework 19
- Do 4.5 # 3,5,13 and chapter supplementary exercises #1,4,15,21,22
- Due 11-4 4.5 #12a,16
- Homework 20
- Do 3.2 #1,6,7,11,12 and 3.4 #1,6,13
- Due 11-6 3.2 #4 and 3.4 #4
- Homework 21
- Do 8.1 #6,7,11,12,15,21 and 8.3 #1,6,11,15
- Due 11-13 8.1 #16 and 8.3 #14a
Exam 2 Wednesday November 18 in class
- Homework 22
- Do 5.7 #1,5 and 5.8 #1,5 and chapter 5 supplmentary exercise #39
- Due 11-30 5.7 #4 and 5.8 #6
- Homwork 23
- Do 10.2 #1a,1c,1f,5,19 and 10.6 #1
- Due 12-2 10.6 #4
Final exam Saturday December 12 from 4-7 pm in CU 230