more from Graham Priest

### Single Idea 9677

#### [catalogued under 4. Formal Logic / F. Set Theory ST / 2. Mechanics of Set Theory / a. Symbols of ST]

Full Idea

Φ indicates the empty set, which has no members

Gist of Idea

Φ indicates the empty set, which has no members

Source

Graham Priest (Intro to Non-Classical Logic (1st ed) [2001], 0.1.4)

Book Reference

Priest,Graham: 'Introduction to Non-Classical Logic' [CUP 2001], p.-7