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Abstract: Discussion of a simple example demonstrates various expressive limitations of the refinement calculus, and suggests a liberalization of refinement, called retrenchment, which will support an analogous formal development calculus. Useful concrete system behaviour can be specified outside the domain of pure refinement, and a case is made for fluidity between I/O and state components across the development step. A syntax and a formal definition are presented for retrenchment, which has some... (Update)
Context of citations to this paper: More
...of refinement, and its utility for formally verifiable software construction. We have argued, when first proposing the notion [BP98, PB99], for a weakening of the retrieve relation over the operation step, allowing concrete non simulating behaviour in retrenchment....
...completion of recovery, the concrete system may once again become simulable, etc. Early results on punctured simulation appear in [Banach and Poppleton (1999a) once more in the context of the B Method. Conc 0 Conc 1 Conc 2 Conc 0 Conc 1 Conc 2 0 Conc 0 1 2 . 1...
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BibTeX entry: (Update)
M. Poppleton and R. Banach. Retrenchment: Extending the Reach of Refinement. In ASE'99: Fourteenth IEEE International Conference on Automated Software Engineering, Cocoa Beach, Florida, October 1999. IEEE Computer Society Press. http://citeseer.ist.psu.edu/article/poppleton99retrenchment.html More
@inproceedings{ poppleton99retrenchment,
author = "M. Poppleton and Richard Banach",
title = "Retrenchment: Extending the Reach of Refinement",
booktitle = "Automated Software Engineering",
pages = "158-165",
year = "1999",
url = "citeseer.ist.psu.edu/article/poppleton99retrenchment.html" }
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