Mathematics All Around (6th Edition)
6th Edition
ISBN: 9780134434681
Author: Tom Pirnot
Publisher: PEARSON
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Textbook Question
Chapter 11.3, Problem 37E
Consider the system
a. Calculate the Banzhaf power index for each person in this system.
b. How does this conform with your intuition? Explain.
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7. [10 marks]
Let G
=
(V,E) be a 3-connected graph. We prove that for every x, y, z Є V, there is a
cycle in G on which x, y, and z all lie.
(a) First prove that there are two internally disjoint xy-paths Po and P₁.
(b) If z is on either Po or P₁, then combining Po and P₁ produces a cycle on which
x, y, and z all lie. So assume that z is not on Po and not on P₁. Now prove that
there are three paths Qo, Q1, and Q2 such that:
⚫each Qi starts at z;
• each Qi ends at a vertex w; that is on Po or on P₁, where wo, w₁, and w₂ are
distinct;
the paths Qo, Q1, Q2 are disjoint from each other (except at the start vertex
2) and are disjoint from the paths Po and P₁ (except at the end vertices wo,
W1, and w₂).
(c) Use paths Po, P₁, Qo, Q1, and Q2 to prove that there is a cycle on which x, y, and
z all lie. (To do this, notice that two of the w; must be on the same Pj.)
6. [10 marks]
Let T be a tree with n ≥ 2 vertices and leaves. Let BL(T) denote the block graph of
T.
(a) How many vertices does BL(T) have?
(b) How many edges does BL(T) have?
Prove that your answers are correct.
4. [10 marks]
Find both a matching of maximum size and a vertex cover of minimum size in
the following bipartite graph. Prove that your answer is correct.
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Chapter 11 Solutions
Mathematics All Around (6th Edition)
Ch. 11.1 - Four candidates running for a vacant seat on the...Ch. 11.1 - Five candidates running for mayor receive votes as...Ch. 11.1 - The university administration has asked a group of...Ch. 11.1 - The university administration has asked a group of...Ch. 11.1 - The university administration has asked a group of...Ch. 11.1 - The university administration has asked a group of...Ch. 11.1 - The drama society members are voting for the type...Ch. 11.1 - The drama society members are voting for the type...Ch. 11.1 - The drama society members are voting for the type...Ch. 11.1 - The drama society members are voting for the type...
Ch. 11.1 - Before a conference on Trends in the next Decade,...Ch. 11.1 - Before a conference on Trends in the next Decade,...Ch. 11.1 - Prob. 13ECh. 11.1 - Prob. 14ECh. 11.1 - A small employee-owned Internet company is voting...Ch. 11.1 - Prob. 16ECh. 11.1 - Prob. 17ECh. 11.1 - A small employee-owned Internet company is voting...Ch. 11.1 - Prob. 19ECh. 11.1 - Prob. 20ECh. 11.1 - Prob. 21ECh. 11.1 - Prob. 22ECh. 11.1 - In Exercises 23-26, refer to the preference table...Ch. 11.1 - Prob. 24ECh. 11.1 - In Exercises 23-26, refer to the preference table...Ch. 11.1 - Prob. 26ECh. 11.1 - In Exercises 27-30, refer to the preference table...Ch. 11.1 - In Exercises 27-30, refer to the preference table...Ch. 11.1 - In Exercises 27-30, refer to the preference table...Ch. 11.1 - Prob. 30ECh. 11.1 - Prob. 31ECh. 11.1 - Prob. 32ECh. 11.1 - Prob. 33ECh. 11.1 - Prob. 34ECh. 11.1 - Prob. 35ECh. 11.1 - Prob. 36ECh. 11.1 - Prob. 37ECh. 11.1 - Prob. 38ECh. 11.1 - Prob. 39ECh. 11.1 - Prob. 40ECh. 11.1 - Prob. 41ECh. 11.1 - Prob. 42ECh. 11.1 - Prob. 43ECh. 11.1 - Math in Your Life: Between the Numbers Instant...Ch. 11.1 - In approval voting, a person can vote for more...Ch. 11.1 - Prob. 46ECh. 11.1 - Prob. 47ECh. 11.1 - Prob. 48ECh. 11.1 - Prob. 49ECh. 11.1 - Prob. 50ECh. 11.1 - Prob. 51ECh. 11.1 - Prob. 52ECh. 11.2 - Some of these exercises have no fixed solution...Ch. 11.2 - Some of these exercises have no fixed solution...Ch. 11.2 - Determining the legal drinking age. A state...Ch. 11.2 - Voting for the president of a club. A chapter of...Ch. 11.2 - Choosing a location for a research facility. Teach...Ch. 11.2 - Locating a new factory. The Land Mover Tractor...Ch. 11.2 - Reducing a budget. Due to a decrease in state...Ch. 11.2 - Voting on an award for best restaurant. A group of...Ch. 11.2 - Use the following preference table for Exercises 9...Ch. 11.2 - Use the following preference table for Exercises 9...Ch. 11.2 - Complete the preference table so that the Borda...Ch. 11.2 - Complete the preference table so that A is the...Ch. 11.2 - Prob. 13ECh. 11.2 - Make a preference table similar to the one given...Ch. 11.2 - Complete the preference table so that the...Ch. 11.2 - Does the plurality method satisfy the majority...Ch. 11.2 - Does the plurality-with-elimination method satisfy...Ch. 11.2 - Prob. 18ECh. 11.2 - Presidential election. One of the several...Ch. 11.2 - Prob. 20ECh. 11.2 - Prob. 21ECh. 11.2 - A run off election. Repeat Exercise 21 using this...Ch. 11.2 - Prob. 23ECh. 11.2 - Prob. 24ECh. 11.2 - Prob. 25ECh. 11.2 - Prob. 26ECh. 11.2 - Prob. 27ECh. 11.2 - Voters are choosing among five options. Make a...Ch. 11.2 - Make a preference table, similar to the one given...Ch. 11.2 - Prob. 30ECh. 11.2 - Prob. 31ECh. 11.2 - Prob. 32ECh. 11.2 - Prob. 33ECh. 11.2 - Prob. 34ECh. 11.2 - One of the voting methods we have been discussing...Ch. 11.3 - Prob. 1ECh. 11.3 - Prob. 2ECh. 11.3 - In Exercises 1-12, the weight represent voters A,...Ch. 11.3 - Prob. 4ECh. 11.3 - Prob. 5ECh. 11.3 - Prob. 6ECh. 11.3 - In Exercises 1-12, the weight represent voters A,...Ch. 11.3 - In Exercises 1-12, the weight represent voters A,...Ch. 11.3 - In Exercises 1-12, the weight represent voters A,...Ch. 11.3 - Prob. 10ECh. 11.3 - Prob. 11ECh. 11.3 - Prob. 12ECh. 11.3 - In Exercises 13-16, write out all winning...Ch. 11.3 - Prob. 14ECh. 11.3 - In Exercises 13-16, write out all winning...Ch. 11.3 - Prob. 16ECh. 11.3 - Prob. 17ECh. 11.3 - Prob. 18ECh. 11.3 - Prob. 19ECh. 11.3 - Prob. 20ECh. 11.3 - Prob. 21ECh. 11.3 - Prob. 22ECh. 11.3 - Prob. 23ECh. 11.3 - Prob. 24ECh. 11.3 - Prob. 25ECh. 11.3 - Prob. 26ECh. 11.3 - Prob. 27ECh. 11.3 - Prob. 28ECh. 11.3 - Prob. 29ECh. 11.3 - Prob. 30ECh. 11.3 - Prob. 31ECh. 11.3 - Prob. 32ECh. 11.3 - In Exercises 29-34, determine the Banzhaf power...Ch. 11.3 - Prob. 34ECh. 11.3 - The system [3:1,1,1,1,1] is an example of a one...Ch. 11.3 - Prob. 36ECh. 11.3 - Consider the system [14:15,2,3,3,5] in which A is...Ch. 11.3 - Prob. 38ECh. 11.3 - Calculating power in the electoral college. After...Ch. 11.3 - Prob. 40ECh. 11.3 - Prob. 41ECh. 11.3 - Prob. 42ECh. 11.3 - Prob. 43ECh. 11.3 - In Example 5, we analyzed the voting power of the...Ch. 11.3 - In Example 5, we analyzed the voting power of the...Ch. 11.3 - Prob. 46ECh. 11.3 - Prob. 47ECh. 11.3 - Prob. 48ECh. 11.3 - Prob. 49ECh. 11.3 - Prob. 50ECh. 11.3 - A dummy in a weighted voting system is a voter...Ch. 11.3 - Prob. 52ECh. 11.3 - Prob. 53ECh. 11.3 - Prob. 54ECh. 11.3 - In Exercises 55 and 56, devise a voting system...Ch. 11.3 - Prob. 56ECh. 11.4 - In Exercises 1 4, use tree diagrams to find all...Ch. 11.4 - Prob. 2ECh. 11.4 - In Exercises 1 4, use tree diagrams to find all...Ch. 11.4 - Prob. 4ECh. 11.4 - Prob. 5ECh. 11.4 - Prob. 6ECh. 11.4 - Prob. 7ECh. 11.4 - Prob. 8ECh. 11.4 - Prob. 9ECh. 11.4 - Prob. 10ECh. 11.4 - Prob. 11ECh. 11.4 - Prob. 12ECh. 11.4 - In Exercises 1116, determine the Shapley-Shubik...Ch. 11.4 - Prob. 14ECh. 11.4 - Prob. 15ECh. 11.4 - Prob. 16ECh. 11.4 - The system [3:1,1,1,1,1] is an example of a one...Ch. 11.4 - Measuring power on a jury. We can consider a...Ch. 11.4 - Prob. 19ECh. 11.4 - Prob. 20ECh. 11.4 - Prob. 21ECh. 11.4 - Measuring power on a theater guild. The Theater...Ch. 11.4 - Measuring power on a state committee. The college...Ch. 11.4 - Prob. 24ECh. 11.4 - Prob. 25ECh. 11.4 - A new social media company, Chirp, has an...Ch. 11.4 - Prob. 27ECh. 11.4 - Measuring power among states. Repeat Exercise 27...Ch. 11.4 - Explain the difference between the Banzhaf index...Ch. 11.4 - Prob. 30ECh. 11.4 - Prob. 31ECh. 11.4 - Prob. 32ECh. 11.4 - Prob. 33ECh. 11.4 - Prob. 34ECh. 11.CR - Prob. 1CRCh. 11.CR - Prob. 2CRCh. 11.CR - Prob. 3CRCh. 11.CR - Prob. 4CRCh. 11.CR - Prob. 5CRCh. 11.CR - Prob. 6CRCh. 11.CR - Prob. 7CRCh. 11.CR - Prob. 8CRCh. 11.CR - Prob. 9CRCh. 11.CR - Prob. 10CRCh. 11.CR - Prob. 11CRCh. 11.CR - Prob. 12CRCh. 11.CR - Prob. 13CRCh. 11.CR - Prob. 14CRCh. 11.CR - Prob. 15CRCh. 11.CR - Prob. 16CRCh. 11.CR - Prob. 17CRCh. 11.CR - Prob. 18CRCh. 11.CT - Prob. 1CTCh. 11.CT - Prob. 2CTCh. 11.CT - Prob. 3CTCh. 11.CT - Prob. 4CTCh. 11.CT - Prob. 5CTCh. 11.CT - Prob. 6CTCh. 11.CT - Prob. 7CTCh. 11.CT - Prob. 8CTCh. 11.CT - Prob. 9CTCh. 11.CT - Determine the Banzhaf power index for each voter...Ch. 11.CT - Prob. 11CTCh. 11.CT - Prob. 12CTCh. 11.CT - Prob. 13CTCh. 11.CT - Prob. 14CTCh. 11.CT - Prob. 15CTCh. 11.CT - Prob. 16CT
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