Sequent Calculus: A Formal System for Logical Deduction
Sequent calculus is a formal system representing logical deductions. It uses sequences…
Self-Reference
Self-reference occurs when something points back to itself. This concept is crucial…
Robinson Arithmetic
Robinson arithmetic is a simplified version of Peano arithmetic, omitting the induction…
Relevance Logic
Relevance logic is a non-classical logic designed to ensure premises are relevant…
Relative Consistency Proof
A relative consistency proof demonstrates that if a system S is consistent,…
Recursively Axiomatizable Theory
A theory with a recursive set of axioms that can derive all…
Pure Predicate Logic
Pure predicate logic, also known as pure first-order logic, is a formal…
Peano Arithmetic
A formal system of arithmetic using axioms by Giuseppe Peano, it provides…
Non-Classical Logic
Explore logics beyond classical assumptions. This includes intuitionistic, many-valued, and modal systems,…