Form equivalence class Howard-Rubin Number: 67
Statement: DUT: If \(C\) is a collection of pairwisedisjoint topological spaces each of which satisfies the Tietze-Urysohnextension theorem, then the disjoint union of the spaces in \(C\)satisfies the Tietze-Urysohn extension theorem.Howard\slash Kereme\-dis/Rubin/Rubin [1998a] and Note 141.
Howard-Rubin number: 67 M
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