Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Characteristic Parameters and Special Trapezoidal Words   Following earlier work by Aldo de Luca and others, we study trapezoidal words
and their prefixes, with respect to their characteristic parameters $K$ and $R$
(length of shortest unrepeated suffix, and shortest length without right
special factors, respectively), as well as their symmetric versions $H$ and
$L$. We consider the distinction between closed (i.e., periodic-like) and open
prefixes, and between Sturmian and non-Sturmian ones. Our main results
characterize right special and strictly bispecial trapezoidal words, as done by
de Luca and Mignosi for Sturmian words.

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The categories of this paper are: nucl-ex
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The categories of this paper are: hep-ex
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The categories of this paper are: comp-gas
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The categories of this paper are: cond-mat
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The categories of this paper are: gr-qc
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The categories of this paper are: quant-ph
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The categories of this paper are: math-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: hep-ph
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The categories of this paper are: eess
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The categories of this paper are: cmp-lg
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The categories of this paper are: nlin
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The categories of this paper are: physics
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The categories of this paper are: q-alg
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The categories of this paper are: adap-org
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The categories of this paper are: stat