mandate Δημοσ. 22 Αυγούστου 2006 Δημοσ. 22 Αυγούστου 2006 Grigory Perelman, a reclusive Russian mathematician who solved a key piece in a century-old puzzle known as the Poincaré conjecture, was one of four mathematicians awarded the Fields Medal today.But Dr. Perelman refused to accept the medal, as he has other honors, and he did not attend the ceremonies at the International Congress of Mathematicians in Madrid. http://www.nytimes.com/2006/08/22/science/22cnd-math.html?ex=1156392000&en=59cd88eb0de28812&ei=5087%0A http://en.wikipedia.org/wiki/Grigori_Perelman αυτά είναι
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