Around Borsuk's Problem

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Atrax, a distributed web crawler
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Let f(d) be the smallest number such that every set of diameter 1 in R^d can be covered by f(d) sets of smaller diameter. Borsuk asked whether f(d)=d+1 holds in all dimensions. A negative answer in very high dimensions was described by Jeff Kahn and me in 1993. In the lecture I will describe some questions around Borsuk's problem.
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