Abstract
We introduce the notion of semigroup with a tight ideal series and investigate their closures in semitopological semigroups, particularly inverse semigroups with continuous inversion. As a corollary we show that the symmetric inverse semigroup of finite transformations I n λ of the rank ≤ n is algebraically closed in the class of (semi)topological inverse semigroups with continuous inversion. We also derive related results about the nonexistence of (partial) compactifications of classes of semigroups that we consider.
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Communicated by Karl H. Hofmann.
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Gutik, O., Lawson, J. & Repovš, D. Semigroup closures of finite rank symmetric inverse semigroups. Semigroup Forum 78, 326–336 (2009). https://doi.org/10.1007/s00233-008-9112-2
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DOI: https://doi.org/10.1007/s00233-008-9112-2