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JOURNALS
// Zapiski Nauchnykh Seminarov POMI
// Archive
Zap. Nauchn. Sem. LOMI,
1972
Volume 32,
Pages
21–28
(Mi znsl2560)
This article is cited in
4
papers
Some properties of solutions of equations in a free semigroup
N. K. Kossovski
Abstract:
Among other results i t is proved that some recursive set
$M$
cannot be represented in the form
$$ a\in M\Leftrightarrow\exists x_1\cdots x_n(P=Q), $$
where
$P=Q$
is an equation in the free semigroup.
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Steklov Math. Inst. of RAS
, 2024