Martin Dunwoody
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Professor Martin J. Dunwoody (born November 3, 1938) is professor of mathematics at the University of Southampton, England. Dunwoody is working on geometric group theory and low-dimensional topology.
He received some public attention as he claimed to have a proof for one of the Millennium Prize Problems, the Poincaré conjecture, on April 7, 2002, but he had to admit a gap in the proof five days later.