29. Sociologists use graphs to model social relationships. A social network (not to be confused with a network) is a graph where the nodes represent "actors" (e.g., people, companies) and the edges represent relationships, or "ties," between actors (e.g., friendships, business partnerships). Con- sider the social network in Figure 2.9. Figure 2.9 Social network for Exercise 29. (a) A clique in a social network is a group of actors who all have ties to each other. What is the largest clique in the social network in Figure 2.9? (b) If you had to choose the most important actor in this social network, who would you pick? Why? (c) Suppose the actors represent people and the ties represent acquain- tances. If the people in this social network continue to interact, which two (currently unacquainted) actors would you most expect to be- come acquainted? Which two actors are the least likely to become acquainted? Why?

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Essentials of DISCRETE MATHEMATICS

Section 2.1 - GRAPHS

29. Sociologists use graphs to model social relationships. A social network
(not to be confused with a network) is a graph where the nodes represent
"actors" (e.g.., people, companies) and the edges represent relationships,
or "ties," between actors (e.g., friendships, business partnerships). Con-
sider the social network in Figure 2.9.
C
H.
F
Figure 2.9 Social network for Exercise 29.
(a) A clique in a social network is a group of actors who all have ties
to each other. What is the largest clique in the social network in
Figure 2.9?
(b) If you had to choose the most important actor in this social network,
who would you pick? Why?
(c) Suppose the actors represent people and the ties represent acquain-
tances. If the people in this social network continue to interact, which
two (currently unacquainted) actors would you most expect to be-
come acquainted? Which two actors are the least likely to become
acquainted? Why?
Transcribed Image Text:29. Sociologists use graphs to model social relationships. A social network (not to be confused with a network) is a graph where the nodes represent "actors" (e.g.., people, companies) and the edges represent relationships, or "ties," between actors (e.g., friendships, business partnerships). Con- sider the social network in Figure 2.9. C H. F Figure 2.9 Social network for Exercise 29. (a) A clique in a social network is a group of actors who all have ties to each other. What is the largest clique in the social network in Figure 2.9? (b) If you had to choose the most important actor in this social network, who would you pick? Why? (c) Suppose the actors represent people and the ties represent acquain- tances. If the people in this social network continue to interact, which two (currently unacquainted) actors would you most expect to be- come acquainted? Which two actors are the least likely to become acquainted? Why?
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A social network is a graph where the nodes represent ‘actors’ and the edges represent relationships or ‘ties’ between actors. The following graph shows a social network.

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