MCS 236

Problems Assignments

Fall 2000


Homework rules

Click on Reload to make sure you get a current copy and not an old cache.

MCS-236 Problem Assignments

Section Practice problems*/Notes Problems to turn in Due date
1 Fundamentals
1.1 1, 5 + misc. odds 2, 16 F 9/15
1.2 1 + misc. odds 10, 24
Prove De Morgan's law, #15, p. 9.
Please write proof on separate page.
F 9/15
1.3 1, 3, 13, 15, 25, 27 17, 18, 22, 26, 28 F 9/15
1.4 1, 7, 11, 15, 18 6, 8, 12, 14 F 9/15
1.5 6, 8, 24 F 9/22
1.6 Example 12 2, 16, 24, 26 F 9/22
2 Logic
2.1 1, 7, 15, 21 10, 12, 18, 24 &
Is "down-arrow" associative?
F 9/22
2.2 1, 3, 11, 23 2, 4, 8, 12, 24 F 9/22
2.3 1-13 odds 2, 4, 6, 8 &
Prove: If n is a positive integer
and n is not the square of an integer,
then the square root of n is irrational.
F 9/29
2.4 "The most useful, and simplest, proof
technique in combinatorial mathematics
and computer science is mathematical
induction
."--Alan Tucker
6 if a is not 1 (What if a=1?), 28, 32 F 9/29
3 Counting
3.1 1, 21, 25 ... 4, 22, 28 F 10/6
3.2 4, 8, 22 F 10/6
3.3 In-class examples 6, 16 F 10/6
3.4 In 18b MMDD may be rearranged. 9, 10, 18, 30, 32 F 10/13
3.5 1, 3, 5, 13, 17, 19, 26 2, 4, 8, 18, 20;
12, 14, 16
F 10/13
4 Relations and Digraphs
4.1 26 10, 14, 18, 28 F 10/13
4.2 1, 9, 21 6, 12, 22, 24, 26 F 10/13
"It is not an exaggeration to say that
90% of what will be discussed in the
remainder of this book will concern
some type of object that may be
considered a relation." --p. 107
4.3 1-8 10, 15, 16, 17 R 10/19
4.4 2, 8, 10, 15, 21 R 10/19
4.5 1, 3, 5, 13, 17, 19 F 10/19
4.6 Optional
4.7 1, 5, 7, 9, 23 2, 8, 12, 16, 18, 22 F 11/3
4.8 1, 3, 7, 9, 17 8, 10, 12, 14
Proof: Prove Theorem 1 of Sect. 4.4.
F 11/3
5 Functions
5.1 1, 11, 15 14, 18, 25, 26
In #26 do not assume Dom(f)=A.
F 11/3
5.2 22 F 11/3
5.3 1, 7 4, 8, 11 F 11/3
5.4 6, 24
25: Write self-contained PROOFS
Turn in proofs separately.
F 11/10
6 Order Relations and Structures
6.1 1, 3, 5, 9, 13, 27 2, 4, 10, 14; 26 F 11/10
6.2 4, 10, 26, 31 F 11/10
6.3 Handout 4, 6, 9,
24 (PROOFS)
worksheet
F 11/17
6.4 1, 3, 5, 7, 9 2, 4, 6, 8, 10,
14 (PROOF)
F 11/17
6.5 "It is almost impossible to overestimate
the importance of these facts [about
Boolean polynomials] for the study of
computer circuitry." (228)
2, 6, 16 F 11/17
6.5 Extra credit:
Express all 16 Boolean functions of x, y
using NANDs as the only operation.
  T 11/21
6.6 1, 3, 5, 9, 11, 13, 15, 21    
7 Trees
7.1 2, 3, 9, 10, 11a, 12a, 13, 19, 22-25.
*   Turn in proof portfolios for review. W 11/22
7.2 1, 2, 3, 5, 6, 7, 8, 9, 11, 15 4, 10, 12, 16, 20 F 12/1
7.3 1, 3, 19, 27, 31 2, 7, 12, 20, 28, 32 F 12/1
7.4 6, 14 F 12/8
7.5 4, 8 F 12/8
8.1 7, 9, 13 6, 8, 10, 18, 24;
26 (PROOF)
F 12/8
8.2 Example 6 4, 6, 10, 12, 14 F 12/8

* These are merely some suggested problems. You should work as many problems as necessary to master the ideas.