1. A system of abstract thought based on the structure of formal logic, consisting of symbols, rules, and axioms used to derive theorems
A formal system in mathematics provides a rigorous framework for proving theorems.
Um sistema formal em matemática fornece um arcabouço rigoroso para provar teoremas.
2. In logic and computer science, a set of symbols and rules for combining them to produce well-formed formulas
The formal system of propositional logic uses symbols like ∧, ∨, and ¬.
O sistema formal da lógica proposicional usa símbolos como ∧, ∨ e ¬.