Coverings by classes of permutable equivalence relations (Q1918783)
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scientific article; zbMATH DE number 907271
| Language | Label | Description | Also known as |
|---|---|---|---|
| English | Coverings by classes of permutable equivalence relations |
scientific article; zbMATH DE number 907271 |
Statements
Coverings by classes of permutable equivalence relations (English)
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4 November 1996
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B. H. Neumann proved that indices of subgroups in a proper covering of a group by cosets are finite. The main result of the present paper is an extension of B. H. Neumann's theorem for coverings of a given set by classes of permutable equivalence relations on the set.
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coverings of sets
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permutable equivalence relations
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