A New Kind of Grammars: A new kind of generative grammars that can produce the empty language is designed in this book. <br /> <br /> http://www.amazon.com/New-Kind-Grammars-generative-grammars/dp/1452828687<br /> <br /> An unrepresented mongrel of Computer Science, the null or invalid string gets a new representative symbol in this book.

ahhhh oui effectivement il fait de la lumière le piano ! j'ai deja vu ce clip à la télé en plus !!!