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  "body": "\n## Summary\n\n***Euler's Gem: The Polyhedron Formula and the Birth of Topology*** is a book on the formula $V-E+F=2$ for the Euler characteristic of convex polyhedra and its connections to the history of topology. It was written by David Richeson and published in 2008 by the Princeton University Press, with a paperback edition in 2012. It won the 2010 Euler Book Prize of the Mathematical Association of America.\n",
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