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JACIII Vol.10 No.3 pp. 245-259
doi: 10.20965/jaciii.2006.p0245
(2006)

Paper:

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Formalization of the Equivalent Transformation Computation Model

Kiyoshi Akama*, and Ekawit Nantajeewarawat**

*Division of Large-Scale Computational Systems, Information Initiative Center, Hokkaido University, Kita 11 Nishi 5, Kita-ku, Sapporo, Hokkaido 060-0811, Japan

**Computer Science Program, Sirindhorn International Institute of Technology, Thammasat University, P.O. Box 22, Thammasat-Rangsit Post Office, Rangsit Campus, Pathumthani 12121, Thailand

Received:
February 22, 2005
Accepted:
December 21, 2005
Published:
May 20, 2006
Creative Commons License
Keywords:
computation model, equivalent transformation, program synthesis, program correctness, rule-based computation
Abstract
In the equivalent transformation (ET) computation model, a specification provides background knowledge in a problem domain and defines a set of queries of interest. A program is a set of prioritized transformation rules, and computation consists in successive reduction of queries using meaning-preserving transformation with respect to given background knowledge. We present a formalization of the ET model from the viewpoint of program synthesis, where not only computation but also program correctness and correctness relations are of central importance. The notion of program correctness defines “what it means for a program to be correct with respect to a specification,” and a correctness relation provides guidance on “how to obtain such a program.” The correctness relation of the ET model is established, based on which how the basic structure of the ET model facilitates program synthesis is discussed together with program synthesis strategies in this model.
Cite this article as:
K. Akama and E. Nantajeewarawat, “Formalization of the Equivalent Transformation Computation Model,” J. Adv. Comput. Intell. Intell. Inform., Vol.10 No.3, pp. 245-259, 2006.
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