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The Rank and Hanna Neumann Property of Some Submonoids of a Free Monoid

This work aims at further investigations on the work of Giambruno and Restivo to find the rank of the intersection of two finitely generated submonoids of a free monoid. In this connection, we obtain the rank of a finitely generated submonoid of a free monoid that is accepted by semi-flower automaton with two bpi's. Further, when the product automaton of two deterministic semi-flower automata with a unique bpi is semi-flower with two bpi's, we obtain a sufficient condition on the product automaton in order to satisfy the Hanna Neumann property.

preprint2011arXivOpen access
Shubh Narayan SinghK. V. Krishna
Formal Languages and Automata Theorymath.RA
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Shubh Narayan SinghK. V. Krishna

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