科研之友
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摘要
We give a description of definable sets P = (p(1),...,p(m)) in a free non-abelian group F and in a torsion-free non-elementary hyperbolic group G. As a corollary we show that proper non-cyclic subgroups of F and G are not definable. This answers Malcev%26apos;s question posed in 1965 for F.
- 出版日期2013-2
