transformation rule

logic

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In formal logic: Axiomatization of PC
Such rules are called transformation rules. Sometimes the word “theorem” is used to cover axioms as well as theorems; the word “thesis” is also used for this purpose.
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In formal logic: Axiomatization of LPC
Transformation rules:
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In formal logic: Alternative systems of modal logic
The transformation rules of T are uniform substitution, modus ponens, and a rule to the effect that if α is a theorem so is Lα (the rule of necessitation). The intuitive rationale of this rule is that, in a sound axiomatic system, it is expected that…
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