aris: aris (sequential proof program) aris: aris: GNU Aris is a sequential proof program, designed to assist anyone aris: interested in solving logical proofs. Aris supports both propositional aris: and predicate logic, as well as Boolean algebra and arithmetical logic aris: in the form of abstract sequences. It uses a predefined set of both aris: inference and equivalence rules, however gives the user options to use aris: older proofs as lemmas, including Isabelle's Isar proofs. aris: aris: Home page: https://www.gnu.org/software/aris/ aris: