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The 69th William Lowell Putnam Mathematical Competition Saturday, December 6, 2008 A–1 Let f : R2 → R be a function such that f (x, y)+ f (y, z)+ f (z, x) = 0 for all real numbers x, y, and z. Prove that there exists
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Document Date: 2014-01-16 17:23:35
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The 69th William Lowell Putnam Mathematical Competition Saturday, December 6, 2008 A–1 Let f : R2 → R be a function such that f (x, y)+ f (y, z)+ f (z, x) = 0 for all real numbers x, y, and z. Prove that there exists