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On the Completeness of Residuation

MPG-Autoren
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Hanus,  Michael
Programming Logics, MPI for Informatics, Max Planck Society;

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Zitation

Hanus, M. (1992). On the Completeness of Residuation. In K. Apt (Ed.), Proceedings of the Joint International Conference and Symposium on Logic Programming (JICSLP '92) (pp. 192-206). Cambridge, USA: MIT Press.


Zitierlink: https://hdl.handle.net/11858/00-001M-0000-0014-AE19-C
Zusammenfassung
Residuation is an operational mechanism for the integration of functions into
logic programming languages. The residuation principle delays the evaluation of
functions during the unification process until the arguments are sufficiently
instantiated. This has the advantage that the deterministic nature of functions
is preserved but the disadvantage of incompleteness: if the variables in a
delayed function call are not instantiated by the logic program, this function
can never be evaluated and some answers which are logical consequences of the
program are lost. In this paper we present a method for detecting such
situations. The method is based on a compile-time analysis of the program and
approximates the possible residuations and instantiation states of variables
during program execution.