The Z notation: a reference manual
The Z notation: a reference manual
Using Z: specification, refinement, and proof
Using Z: specification, refinement, and proof
Putting Numbers into the Mathematical Toolkit
Proceedings of the Z User Workshop
Structuring Z Specifications: Some Choices
ZUM '95 Proceedings of the 9th International Conference of Z Usres on The Z Formal Specification Notation
IW-FM'98 Proceedings of the 2nd Irish conference on Formal Methods
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A formal specification is presented in the Z language for a simplified version of the Single Transferable Vote form of election. This is a correctness-critical application which is one of a class of related and interesting applications, i.e. electoral models. This specification is based on the form of election defined by the Students' Representative Council of the University of Cape Town, and demonstrates the utility of formal specification for requirements validation. A succinct statement of the algorithm is given using the schema calculus. The specification provides a vehicle for contributing to the current debate on good Z specification style. Brief discussion of specification styles in the literature sets the context for an overview style employed here, one of functional decomposition.