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Journal Articles Information and Computation Year : 2003

Non-Structural Subtype Entailment in Automata Theory

Abstract

Decidability of non-structural subtype entailment is a long-standing open problem in programming language theory. In this paper, we apply automata theoretic methods to characterize the problem equivalently by using regular expressions and word equations. This characterization induces new results on non-structural subtype entailment, constitutes a promising starting point for further investigations on decidability, and explains for the first time why the problem is so difficult. The difficulty is caused by implicit word equations that we make explicit.
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Dates and versions

inria-00536540 , version 1 (05-02-2011)

Identifiers

  • HAL Id : inria-00536540 , version 1

Cite

Joachim Niehren, Tim Priesnitz. Non-Structural Subtype Entailment in Automata Theory. Information and Computation, 2003, 169 (2), pp.319-354. ⟨inria-00536540⟩
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