Gambarajah Venn

Proofs proceed by applying the rules which remove or add syntactic elements to or from. In the early 1990s Sun-Joo Shin presented an extension of Existential Graphs called Venn-II.

Teorimath 14 Set

The Venn-II reasoning system.

. Syntax and semantics are given formally together with a set of Rules of Transformation which are shown to be sound and complete.

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