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Showing 2014 · math.COShow all
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math.CO2014
On Levine's notorious hat puzzle
Joe Buhler, Chris Freiling, Ron Graham +5
The Levine hat game requires players, each wearing an infinite random stack of black and white hats, to guess the location of a black hat on their own head seeing only the hats…
math.CO2014
Sandpiles and Dominos
Laura Florescu, Daniela Morar, David Perkinson +2
We consider the subgroup of the abelian sandpile group of the grid graph consisting of configurations of sand that are symmetric with respect to central vertical and horizontal axe…