A natural deduction system for orthomodular logic

• URL: http://arxiv.org/abs/2109.05383v3
• Date: Tue, 12 Oct 2021 20:04:50 GMT
• Title: A natural deduction system for orthomodular logic
• Authors: Andre Kornell
• Abstract summary: Orthomodular logic is a weakening of quantum logic in the sense of Birkhoff and von Neumann. It is shown to be a nonlinear noncommutative logic. It is extended to two systems of predicate logic: the first is sound for Takeuti's quantum set theory, and the second is sound for a variant of Weaver's quantum logic.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Orthomodular logic is a weakening of quantum logic in the sense of Birkhoff and von Neumann. Orthomodular logic is shown to be a nonlinear noncommutative logic. Sequents are given a physically motivated semantics that is consistent with exactly one semantics for propositional formulas that use negation, conjunction, and implication. In particular, implication must be interpreted as the Sasaki arrow, which satisfies the deduction theorem in this logic. As an application, this deductive system is extended to two systems of predicate logic: the first is sound for Takeuti's quantum set theory, and the second is sound for a variant of Weaver's quantum logic.

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