...self-similarity
This word is characterized by Mandelbrot[&make_named_href('', "node22.html#Mand82","[Mand82]")] as follows: ``When each piece of a shape is geometrically similar to the whole, both the shape and the cascade that generate it are called self-similar''.
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...grammars
Noam Chomsky, a Professor at MIT, is a world-renowned linguist, philosopher and social activist with over 800 publications. Invented by Chomsky in 1956, Chomsky grammar[&make_named_href('', "node22.html#Chom56","[Chom56]")] is originally a formalism to describe the syntactic features of natural languages, in which the production rules(grammar rules) are applied sequentially to the input strings(language sentences) to generate more and more complicated strings(language sentences). Chomsky grammar now has great practical importance in the design of the compilers for programming languages.
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Tong Lin (tlin2@cs.umbc.edu)