User talk:Joris.deguet

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Ambiguous grammar
Hello, I removed the fact template.

Hopcroft, Ullman in "Introduction to Automata Theory, Languages and Computation" write: "It is not decidable to determine given any context-free grammar whether it is ambiguous or not" (this is not an exact quote - my translation from Polish; chapter "Undecidability", section "Post correspondence problem")

Best, 212.87.13.71 (talk) 19:36, 12 May 2008 (UTC)

January 2017
Please do not add inappropriate external links to Wikipedia, as you did to Ranked pairs. Wikipedia is not a collection of links, nor should it be used for advertising or promotion. Inappropriate links include, but are not limited to, links to personal websites, links to websites with which you are affiliated (whether as a link in article text, or a citation in an article), and links that attract visitors to a website or promote a product. See the external links guideline and spam guideline for further explanations. Because Wikipedia uses the nofollow attribute value, its external links are disregarded by most search engines. If you feel the link should be added to the page, please discuss it on the associated talk page rather than re-adding it. Thank you. Melcous (talk) 13:48, 4 January 2017 (UTC)
 * Hi and thanks for your message on my talk page. As the above message says, I suggest that you go to the article's talk page and propose the link you want added there, to avoid issues of conflict of interest and maintain neutrality. Thanks, Melcous (talk) 23:20, 4 January 2017 (UTC)