Pierre - Problem
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Pierre Ferrari | A Wicked Problem: Understanding Complexity
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Pierre Stinglhamber - No swell no problem
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Georges St-Pierre " Nick Diaz is a different problem than Shields"
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Pierre Pansu: Differential forms and the Hölder equivalence problem - Part 1
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Fermat's Last Theorem - The Theorem and Its Proof: An Exploration of Issues and Ideas [1993]