Papers › Producing symmetrical facts for lists induced by the list reversal mapping in Isabelle/HOL
Producing symmetrical facts for lists induced by the list reversal mapping in Isabelle/HOL
Martin Raška, Štěpán Starosta
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Many facts possess symmetrical counterparts that often require a separate formal proof, depending on the nature of the involved symmetry. We introduce a method in Isabelle/HOL which produces such a symmetrical fact for the list datatype and the symmetry induced by the list reversal mapping. The method is implemented as an attribute and its result is based on user-declared symmetry rules. Besides general rules, we provide rules that are aimed to be applied in the domain of Combinatorics on Words.
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