Sets and mappings in \(\beta S\) which are not Borel

zbMath1405.54014MaRDI QIDQ1796315

Neil Hindman, Dona E. Strauss

Publication date: 17 October 2018

Published in: The New York Journal of Mathematics (Search for Journal in Brave)

Full work available at URL: http://nyjm.albany.edu/j/2018/24-34.html

zbMATH Keywords

idempotentsBorel setsČech-Stone compactificationdiscrete semigroupright and left solution sets

Mathematics Subject Classification ID

Classes of sets (Borel fields, (sigma)-rings, etc.), measurable sets, Suslin sets, analytic sets (28A05) Extensions of spaces (compactifications, supercompactifications, completions, etc.) (54D35) Descriptive set theory (topological aspects of Borel, analytic, projective, etc. sets) (54H05) Structure of topological semigroups (22A15) Special constructions of topological spaces (spaces of ultrafilters, etc.) (54D80)

Related Items (2)

Some new results about left ideals of \(\beta S\) ⋮ On ultrafilter extensions of first-order models and ultrafilter interpretations

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