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比利时vs摩洛哥足彩
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比利时vs摩洛哥足彩
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university of california san diego
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math 269 - combinatorics
jozsef solymosi
ucsd
on a problem of ron graham
abstract:
we give a quantitative proof that forsufficiently large n=n(c), every subset of$[n]^2$ of size at least $cn^2$ contains a square, i.e. four pointswith coordinates {(a,b),(a+d,b),(a,b+d),(a+d,b+d)}.
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october 15, 2002
4:00 pm
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