Springer-Verlag I will not allow books to prove anything.

This book is two books. Part I is a practical introduction to working with the Isabelle proof assistant. It teaches you how to write functional programs and inductive definitions and how to prove properties about them in Isa-belle’s structured proof language. Part II is an introduction to the semantics of imperative languages with an emphasis on applications like compilers and program analysers. The distinguishing features are that every bit of mathe-matics has been formalized in Isabelle and that much of it is executable. Part I focusses on the details of proofs in Isabelle. Part II can be read even without familiarity with Isabelle’s proof language: all proofs are described in detail but informally. The Isabelle formalization, including the proofs, is available online: all the material, including accompanying slides, can be downloaded from the book’s home pag