The Clay Mathematics Institute is offering a million dollars for a solution to the Poincaré conjecture, and Grisha Perelman may have found one. What is the conjecture, and why does it matter?
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Perelman, G. Preprint math.DG/0211159 at <http://arXiv.org> (2002).
Perelman, G. Preprint math.DG/0303109 at <http://arXiv.org> (2003).
Stewart, I. Flatterland (Macmillan, London, 2001).
Hamilton, R. S. J. Diff. Geom. 17, 255–306 (1982).
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Stewart, I. Conjuring with conjectures. Nature 423, 125–127 (2003). https://doi.org/10.1038/423124a
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