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arXiv · 1812.08362

A nonstandard take on central sets

Isaac Goldbring
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Abstract

We present the basic theory of central subsets of semigroups from the nonstandard perspective. A key feature of this perspective is the replacement of the algebra of ultrafilters with the algebra of elements of iterated hyperextensions, a technique first employed by Mauro Di Nasso.

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Isaac Goldbring. 2018-12-20. A nonstandard take on central sets. https://arxiv.org/abs/1812.08362

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