Systems Development Using Z Generics
FM '99 Proceedings of the Wold Congress on Formal Methods in the Development of Computing Systems-Volume II
An outline pattern language for Z: five illustrations and two tables
ZB'03 Proceedings of the 3rd international conference on Formal specification and development in Z and B
Z/Eves and the mondex electronic purse
ICTAC'06 Proceedings of the Third international conference on Theoretical Aspects of Computing
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One of the touted advantages of formal methods is the ability to do proof. But examples of proofs as part of industrial formal methods projects are relatively hard to find. I describe here two of the large Z proof projects I have been involved in at Logica, and show how the entire specification and proof process is deeply affected by why something is being proved, what is being proved, and how the finished proof is to be presented. I finish off by describing, based on my experiences, what I believe to be the requirements for an industrial-strength Z proof tool.