Definition:Extension of Propositional Tableau/Definition 1

Definition

Let $T$ be a propositional tableau.

A tableau $T'$ is an extension of $T$ if $T'$ can be obtained from $T$ by repeatedly adding nodes to the leaf nodes of $T$ (by means of the tableau extension rules).

Sources

• 1996: H. Jerome Keisler and Joel Robbin: Mathematical Logic and Computability ... (previous) ... (next): $\S 1.10$: Completeness