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Presentability of Groups of $\Sigma$-Definable Permutations over Admissible Sets
Algebra i logika, Tome 41 (2002) no. 4, pp. 459-480 Cet article a éte moissonné depuis la source Math-Net.Ru

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It is proved that a group of all $\Sigma$-permutations of an arbitrary locally countable, recursively listed, admissible set is not $\Sigma$-presentable over that set. An example is constructed showing that this group can be presentable provided that the condition of being locally countable is dropped.
Mots-clés : group, admissible set.
Keywords: $\Sigma$-definable (-presentable) permutation, $\Sigma$-definability, locally countable, recursively listed 
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     author = {A. S. Morozov},
     title = {Presentability {of~Groups} of $\Sigma${-Definable} {Permutations} over {Admissible} {Sets}},
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     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_2002_41_4_a3/}
}
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A. S. Morozov. Presentability of Groups of $\Sigma$-Definable Permutations over Admissible Sets. Algebra i logika, Tome 41 (2002) no. 4, pp. 459-480. http://geodesic.mathdoc.fr/item/AL_2002_41_4_a3/

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