= 27d567bc2d48d9f40e9ccc20ea370b15)
Sewing-Machine comments on Second order logic, in first order set-theory: what gives? - Less Wrong Discussion
You are viewing a comment permalink. View the original post to see all comments and the full post content.
= 783df68a0f980790206b9ea87794c5b6)
Loading…= b715d02e85f7b3b4ae65ca3d3e450868)
Subscribe to RSS Feed
Powered by Reddit
= f037147d6e6c911a85753b9abdedda8d)
You are viewing a comment permalink. View the original post to see all comments and the full post content.
Comments (19)
ZFC amounts to a binary relation "is an element of", satisfying some axioms. A countable model of ZFC is a binary relation on the integers 1,2,3,... satisfying the axioms. According to set theory such a relation exists, for instance this is a consequence of the Lowenheim-Skolem theorem. This relation is not computable.