Dickman function: Difference between revisions

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{{Orphan|date=November 2006}}
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In [[formal language]] theory, a '''picture language''' is a set of ''pictures'', where a picture is a 2D array of characters over some alphabet.
 
For example, the language <math>L = \left \{ a^{n,n} | n > 0 \right \} </math> defines the language of squares composed of the character <math>a</math>. This language <math>L</math> contains pictures such as:
 
            a a a a <math> \in L </math>
  a, a, a a
 
The study of picture languages was initially motivated by the problems of pattern recognition and image processing, but two-dimensional patterns also appear in the study of cellular automata and other parallel computing models.  Some [[formal system]]s have been created to define picture languages, such as array grammars and tiling systems.
 
==References==
* D. Giammaresi, A. Restivo.  [http://www.mat.uniroma2.it/~giammarr/Research/Papers/chap96.ps.Z Two-dimensional languages].  In [[Arto Salomaa|A. Salomaa]], G. Rozenberg (Eds.), ''Handbook of Formal Languages'', Vol. 3, Beyond Words, Springer, Berlin, 1997, pp.&nbsp;215–267.
 
[[Category:Formal languages]]
 
 
{{formalmethods-stub}}

Latest revision as of 23:51, 6 January 2015

Royal Votaw is my name but I never truly favored that name. His day occupation is a cashier and his wage has been really fulfilling. What she loves doing is bottle tops collecting and she is trying to make it a occupation. Some time in the past he chose to live in Kansas.

My webpage :: extended auto warranty

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