Isabelle: Isabelle (generic proof assistant) Isabelle: Isabelle: Isabelle is a generic proof assistant. It allows mathematical Isabelle: formulas to be expressed in a formal language and provides tools for Isabelle: proving those formulas in a logical calculus. Isabelle was Isabelle: originally developed at the University of Cambridge and Technische Isabelle: Universitat Munchen, but now includes numerous contributions from Isabelle: institutions and individuals worldwide. Isabelle: Isabelle: Isabelle: