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Published in:
2015 | OriginalPaper | Chapter
Equation in Words
Authors : Jana Hadravová, Štěpán Holub
Published in: Language and Automata Theory and Applications
Publisher: Springer International Publishing
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We will prove that the word
$$a^ib^ja^k$$
is periodicity forcing if
$$j \ge 3$$
and
$$i+k \ge 3$$
, where
$$i$$
and
$$k$$
are positive integers. Also we will give examples showing that both bounds are optimal.