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Title: On multi-head automata with restricted nondeterminism
Authors: Reidenbach, Daniel
Schmid, Markus L.
Keywords: Multi-head automata
Restricted nondeterminism
Issue Date: 2012
Publisher: © Elsevier
Citation: REIDENBACH, D. and SCHMID, M.L., 2012. On multi-head automata with restricted nondeterminism. Information Processing Letters, 112 (14-15), pp. 572 - 577
Abstract: In this work, we consider deterministic two-way multi-headautomata, the input heads of which are nondeterministically initialised, i.e., in every computation each input head is initially located at some nondeterministically chosen position of the input word. This model serves as an instrument to investigate restrictednondeterminism of two-way multi-headautomata. Our result is that, in terms of expressive power, two-way multi-headautomata with nondeterminism in form of nondeterministically initialising the input heads or with restrictednondeterminism in the classical way, i.e., in every accepting computation the number of nondeterministic steps is bounded by a constant, do not yield an advantage over their completely deterministic counter-parts with the same number of input heads. We conclude this paper with a brief application of this result.
Description: This article was published in the journal, Information Processing Letters [© Elsevier] and the definitive version is available at: http://dx.doi.org/10.1016/j.ipl.2012.04.009
Version: Accepted for publication
DOI: 10.1016/j.ipl.2012.04.009
URI: https://dspace.lboro.ac.uk/2134/9847
Publisher Link: http://dx.doi.org/10.1016/j.ipl.2012.04.009
ISSN: 0020-0190
Appears in Collections:Published Articles (Computer Science)

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