Relative size of subsets of a semigroup
General Topology
2015-06-02 v1
Abstract
Given a semigroup , we introduce relative (with respect to a filter on ) versions of large, thick and prethick subsets of , give the ultrafilter characterizations of these subsets and explain how large could be some cell in a finite partition of a subset .
Keywords
Cite
@article{arxiv.1506.00112,
title = {Relative size of subsets of a semigroup},
author = {Igor Protasov and Serhii Slobodianiuk},
journal= {arXiv preprint arXiv:1506.00112},
year = {2015}
}