Formal system
Mathematical model for deduction or proof systems / From Wikipedia, the free encyclopedia
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A formal system is an abstract structure used for inferring theorems from axioms according to a set of rules. These rules, which are used for carrying out the inference of theorems from axioms, are the logical calculus of the formal system. A formal system is essentially an "axiomatic system".[1]
Mathematical model for deduction or proof systems
In 1921, David Hilbert proposed to use such a system as the foundation for the knowledge in mathematics.[2] A formal system may represent a well-defined system of abstract thought.
The term formalism is sometimes a rough synonym for formal system, but it also refers to a given style of notation, for example, Paul Dirac's bra–ket notation.