On countable nondiscrete fields without nontrivial convergent sequences
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KABANOVA, E.. On countable nondiscrete fields without nontrivial convergent sequences. In: Mathematical Notes, 1992, vol. 52, pp. 798-801. ISSN 0001-4346. DOI: https://doi.org/10.1007/BF01236775
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Mathematical Notes
Volumul 52 / 1992 / ISSN 0001-4346 /ISSNe 1573-8876

On countable nondiscrete fields without nontrivial convergent sequences

DOI:https://doi.org/10.1007/BF01236775

Pag. 798-801

Kabanova E.
 
Institute of Mathematics and Computer Science ASM
 
 
Disponibil în IBN: 14 februarie 2024


Rezumat

In [l] there is given a list of certain open questions in the theory of topological fields. Among them there is A. V. Arkhangel'skii's question: is there a countable nondiscrete topological field without nontrivial convergent sequences? In this paper we give the answer: in any countable field, in any maximal nondiscrete field topology there exist no nontrivial sequences. We mention that from [2] there follows the existence of a countable Abelian topological group without convergent sequences, while in [3] the following theorem is proved: on any Abelian group of cardinality m there exists a precompact topology without convergent sequences.