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Full Idea
A sequent calculus is a useful tool for comparing two systems that at first look utterly different (such as natural deduction and semantic tableaux).
Gist of Idea
A sequent calculus is good for comparing proof systems
Source
David Bostock (Intermediate Logic [1997], 7.2)
Book Ref
Bostock,David: 'Intermediate Logic' [OUP 1997], p.281
13759 | Each line of a sequent calculus is a conclusion of previous lines, each one explicitly recorded [Bostock] |
13760 | A sequent calculus is good for comparing proof systems [Bostock] |
15425 | The sequent calculus makes it possible to have proof without transitivity of entailment [Burgess] |
15426 | We can build one expanding sequence, instead of a chain of deductions [Burgess] |
13686 | We can build proofs just from conclusions, rather than from plain formulae [Sider] |