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1996 | 151 | 2 | 107-120
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Examples of sequential topological groups under the continuum hypothesis

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Using CH we construct examples of sequential topological groups: 1. a pair of countable Fréchet topological groups whose product is sequential but is not Fréchet, 2. a countable Fréchet and $α_1$ topological group which contains no copy of the rationals.
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Opis fizyczny
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