Barabasi: TheThird Link

1. What is the principle of six degrees of separation? What number of social links does
any one person need to be connected to global society? p. 30

The principle of six degrees of separation is that, despite the enormous size of society, it can
be easily navigated by following social links from each other , being connected to global
society requires barely more than one social link per person.

2. How is the fabric of society today different from pre-internet society? p. 31

The link such as URL has been created on World Wide Web allowing to move with the
click of a mouse from one page to another.

3. How many more links separate any pair of web pages compared to people in society? What
can explain the difference? p. 34

Compared to people in society, about eleven more links separates any pair of web pages,
which is average of 19 links. The nodes of network for society is about six billion while the
web nodes is close to 800 million.

4. So far, what ranges of separation have network scientists discovered in different kinds of
networks? p. 34

Between two to fourteen range of separation has been discovered in different kinds of
network by scientists so far.

5. What does research suggest about the fundamentals of networks? p.34-35

The research suggests about the fundamentals of networks is that the network require only
one link per nodes to form a giant cluster and the origin of the small separation is a
logarithmic term present in the formula. The logarithm shrinks the huge networks.

6. What is your estimate of your personal number of connections to society? What
connections are your strongest?

My personal number of connection is infinite, but I estimate that I have at leaset
10000 of connections to the society. This is the estimated number of people I have met in my
life since I was born, the number of people who met in school, job, friends, and
acquaintances. My strongest connection to society is local friend in Koganei-Shi where I grew
up.