more from Achille Varzi

### Single Idea 10653

#### [catalogued under 4. Formal Logic / F. Set Theory ST / 4. Axioms for Sets / a. Axioms for sets]

Full Idea

There are some proposals for non-well-founded set theory (tolerating cases of self-membership and membership circularities).

Gist of Idea

Maybe set theory need not be well-founded

Source

Achille Varzi (Mereology [2003], 2.1)

Book Reference

'Stanford Online Encyclopaedia of Philosophy', ed/tr. Stanford University [plato.stanford.edu], p.5

A Reaction

[He cites Aczel 1988, and Barwise and Moss 1996]