Answer by Mauro ALLEGRANZA for What is the definition of "a derivation of a...
It seems that an explicit definition of "derivation" is lacking.The first occurrence of the term is at page 16, in the context of the calculus of terms.The calculus is a set of rules to generate...
View ArticleWhat is the definition of "a derivation of a sequent "?
In Chapter IV. A Sequent Calculus in Ebbinghaus' Mathematical Logic, a sequent is defined as:If we call a nonempty list (sequence) of formulas a sequent, then we can use sequents to describe "stages in...
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