more from Graham Priest

### Single Idea 9691

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

Full Idea

A set is a 'proper subset' of another set if some things in the large set are not in the smaller set

Gist of Idea

A 'proper subset' is smaller than the containing set

Source

Graham Priest (Intro to Non-Classical Logic (1st ed) [2001], 0.1.6)

Book Reference

Priest,Graham: 'Introduction to Non-Classical Logic' [CUP 2001], p.-6