Theory and Practice of Formal Methods

This Festschrift volume has been published in honor ofFrank de Boer, on the occasion of his 60th birthday. Frank S. de Boer is a prominent member of the research community in formalmethods and theoretical computer science. A brief look at his lengthypublication list reveals a broad area of interest and a versatile modusoperandi with: logic and constraint programming; deductive proof systems,soundness, and completeness; semantics, compositionality, and full abstraction;process algebra and decidab