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Title 19年度応援メッセージカード大抽選会結果発表! Author TMC陸乜溕瞍 豣 Created Date 4/10/ PMHistory The precise statement of the P versus NP problem was introduced in 1971 by Stephen Cook in his seminal paper "The complexity of theorem proving procedures" (and independently by Leonid Levin in 1973) and is considered by many to be the most important open problem in computer science Although the P versus NP problem was formally defined in 1971, there were previousL 0 Í l s ¾ y p ¶ á á @ 4 î á T ; Djvu Postscript Document Italy èñ² p" Vs È'P