The Z notation: a reference manual
The Z notation: a reference manual
Supporting contexts in program refinement
Science of Computer Programming
A Structure Preserving Encoding of Z in Isabelle/HOL
TPHOLs '96 Proceedings of the 9th International Conference on Theorem Proving in Higher Order Logics
Representing WP Semantics in Isabelle/ZF
TPHOLs '99 Proceedings of the 12th International Conference on Theorem Proving in Higher Order Logics
Refining Specifications to Logic Programs
LOPSTR '96 Proceedings of the 6th International Workshop on Logic Programming Synthesis and Transformation
Mechanical Verification of Mutually Recursive Procedures
CADE-13 Proceedings of the 13th International Conference on Automated Deduction: Automated Deduction
A tool for logic program refinement
2FACS'97 Proceedings of the 2nd BCS-FACS conference on Northern Formal Methods
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This paper describes a deep embedding of a refinement calculus for logic programs in Isabelle/HOL. It extends a previous tool with support for procedures and recursion. The tool supports refinement in context, and a number of window-inference tactics that ease the burden on the user. In this paper, we also discuss the insights gained into the suitability of different logics for embedding refinement calculii (applicable to both declarative and imperative paradigms). In particular, we discuss the richness of the language, choice between typed and untyped logics, automated proof support, support for user-defined tactics, and representation of program states.