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math.GR2010★ 9 cited
Brandt extensions and primitive topological inverse semigroups
Tetyana Berezovski, Oleg Gutik, Kateryna Pavlyk
In the paper we study (countably) compact and (absolutely) -closed primitive topological inverse semigroups. We describe the structure of compact and countably compact primitive…
math.GR1996
Almost locally free groups and the genus question
Anthony Gaglione, Dennis Spellman
Sacerdote [Sa] has shown that the non-Abelian free groups satisfy precisely the same universal-existential sentences Th(F) in a first-order language L$_o…