Form equivalence class Howard-Rubin Number: 67
Statement: Every open cover \(\cal U\) of a metric space \((X,d)\) canbe written as a well ordered union \(\bigcup \{U_\alpha : \alpha\in\gamma\}\)where \(\gamma\) is an ordinal and each \(U_\alpha\) is locally finite.Howard/Keremedis/Rubin/Stanley [1999] and Note 141.
Howard-Rubin number: 67 U
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