Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
11010127 | Indagationes Mathematicae | 2018 | 24 Pages |
Abstract
We present three syntactic forcing models for coherent logic. These are based on sites whose underlying category only depends on the signature of the coherent theory, and they do not presuppose that the logic has equality. As an application we give a coherent theory T
and a sentence Ï which is T-redundant (for any geometric implication Ï, possibly with equality, if T+Ïâ¢Ï, then Tâ¢Ï), yet false in the generic model of T. This answers in the negative a question by Wraith.
Related Topics
Physical Sciences and Engineering
Mathematics
Mathematics (General)
Authors
Marc Bezem, Ulrik Buchholtz, Thierry Coquand,