The Colours of Infinity by Nigel Lesmoir-Gordon
Author:Nigel Lesmoir-Gordon [Lesmoir-Gordon, Nigel]
Language: eng
Format: epub
Tags: Technology & Engineering, Geometry, Science, General, Mathematical Physics, Mathematics, Physics, Engineering (General)
ISBN: 9781849964852
Publisher: Springer
Published: 2010-12-29T05:00:00+00:00
self-organIzaTIon, self-regulaTIon, and self-sImIlarITy on The fraCTal Web 101
There are multiple factors that can lead to the dif-
ferences in competition that we see. For commercial Zipf’s Law
wedding sites, one factor could be their local nature: The Web is not alone in exhibiting power laws.
many wedding-related retailers serve only a local area, Data gathered on the use of language, the
and those serving different areas usually do not compete.
population of cities, and the distribution of
wealth all show clear power-law behaviour. The
Another factor may be that people looking for wedding
frequency of words used in human language
services use methods other than the Web more often
deserves special mention: it follows the famous
(e.g. referrals from friends). Perhaps because people use Zipf’s Law, named after George Kingsley Zipf,
wedding providers rarely, they are less likely to create an early twentieth-century scientist who revolu-tionized our understanding of power laws, and
and share information among related sites on the Web.
helped to reveal their astonishing prevalence
Note that more difficulty competing with existing
throughout society and nature.
popular sites does not mean that substantially bet-Zipf’s Law states that the most common word
ter newcomers cannot become popular quickly. For
used in language is a constant factor (say, two
example, Google (a relative latecomer to the search
times) more common than the second most
common word, and the second most common
business) has captured a huge fraction of the Web is twice as common as the third, etc. Remark-search business largely by providing better service ably, for almost any sizeable source of words
and spreading through word of mouth.
you can think of – all New York Times articles, or all the works of Shakespeare, or all textbooks
on molecular biology, or the Bible – Zipf’s law
The Web is a Bow Tie
holds.
In 2000, a collaboration of scientists from AltaVista,
In 1955, Herbert Simon sought to unify the
observations of Zipf and others by formulating
IBM, and Compaq [Broder 2000] discovered a fas-a single common explanatory model for many
cinating property of the Web: somehow, all of the of the systems displaying power-law behaviour,
billions of pages and links have organized them-
including language, population, and wealth.
selves into an overall bow tie shape as pictured in Benoît Mandelbrot [1953,1959] proposed a
fascinating alternative explanation for Zipf’s
Figure 6.8. The centre of the bow tie is a core of Law as it relates to language. He showed that
strongly connected pages: every one of these pages the distribution can be understood as the end
can be reached from any other page within the core
result of centuries of adaptive maximization of
by clicking on a sequence of links (the sequence may
the information content of language.
need to traverse a number of intermediate pages, but
some path exists between the two core pages). The
left bow is connected to the core, but only through
the Web (the core, the left bow, the right bow, and
outgoing links. That is, there exist links from the the disconnected pages). To their surprise, all four left bow to the core, but not vice versa. Conversely,
components were roughly the same size.
the right bow is connected from the core only via A year later, some of the same scientists [Dill inbound links.
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