The \(H\)-sets in the unit circle are properly \(G_{\delta\sigma}\)

zbMath0799.04007MaRDI QIDQ1322628

Tom Linton

Publication date: 24 November 1994

Published in: Real Analysis Exchange (Search for Journal in Brave)

zbMATH Keywords

Hausdorff metricVietoris topologyBorel classification\(H\)-setproperly \(G_{\delta\sigma}\) setternary Cantor set

Mathematics Subject Classification ID

Descriptive set theory (03E15) Classes of sets (Borel fields, (sigma)-rings, etc.), measurable sets, Suslin sets, analytic sets (28A05) Special sets (thin sets, Kronecker sets, Helson sets, Ditkin sets, Sidon sets, etc.) (43A46) Classification of real functions; Baire classification of sets and functions (26A21)

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