ABSTRACT
As an example, letLbe the language of equality, =. The formula
(v1 = v2 ∧ v2 = v3) → v1 = v3 is valid.
validity See valid.
Venn diagram A schematic device used to verify relations among sets contained within a universal set U .
As an example, letLbe the language of equality, =. The formula
(v1 = v2 ∧ v2 = v3) → v1 = v3 is valid.
validity See valid.
Venn diagram A schematic device used to verify relations among sets contained within a universal set U .