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Lecture Notes in Computer Science
We describe an implementation of the Display Logic calculus for relation algebra as an Isabelle theory. Our implementation is the rst mechanisation of any display calculus, but also provides a useful interactive proof assistant for relation algebra. The inference rules of Display Logic are coded directly as Isabelle theorems, thereby guaranteeing the correctness of all derivations. We describe various tactics and derived rules developed for simplifying proof search, including an automaticdoi:10.1007/3-540-49545-2_18 fatcat:hrlp65zylraxxfgi5yoomcuvki