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Fitch Proof Constructor. Click the "Reference" tab for information on what logical symbols to use.
This is a demo of a proof checker for Fitch-style natural deduction systems found in many popular introductory logic textbooks. The specific system used here is the one found in forall x: Calgary.
Proof Checker. Check Your Proof: Propositional First-Order. Premises (separate with “,” or “;”): Conclusion: create problem. Using the checker: Notation for logic operators. Rule names (full and abbreviated) Proof operations. This site based on the Open Logic Project proof checker.
Logitext is an educational proof assistant for first-order classical logic using the sequent calculus, in the same tradition as Jape, Pandora, Panda and Yoda. It is intended to assist students who are learning Gentzen trees as a way of structuring derivations of logical statements.
Tree Proof Generator. Enter a formula of standard propositional, predicate, or modal logic. The page will try to find either a countermodel or a tree proof (a.k.a. semantic tableau). Examples (click!):
Proof Tree Builder is a web-based graphical proof assistant for sequent calculus (LK) and Hoare logic. Sequent calculus. You can click the "Add LK goal" button to add a new sequent calculus goal. You can use && for conjunction, || for disjunction, => for implication, ! for negation. exists and forall for quantification.
17 kwi 2021 · logical diagrams (alpha graphs, Begriffsschrift), Polish notation, truth tables, normal forms (CNF, DNF), Quine-McCluskey and other optimizations
