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Urysohn’s lemma or Lusin-Menchoff theorem? (Polish. English summary) Zbl 1027.01011
Summary: The Urysohn Lemma was published and discovered, a year later than the so-called Lusin-Menchoff theorem. The last one was proved in fact by Vera Bogomolova in 1924 (see JFM 50.0181.03), the author of a single paper. Proofs of the mentioned theorems – as is commonly known – proceed in parallel. There is no doubt of the priority of Bogomolova, but it was Urysohn who understood the topological meaning of the result.
MSC:
01A60 History of mathematics in the 20th century
54-03 History of general topology
Keywords:
Bogomolova; Urysohn
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