Dialectica space

Dialectica spaces are a categorical way of constructing models of linear logic.

They were introduced by Valeria de Paiva, Martin Hyland's student, in her doctoral thesis, as a way of modeling both linear logic and Gödel's dialectica interpretation&mdash;hence the name.

Given a category C and a specific object K of C with certain properties, one can construct the category of Dialectica spaces over C, whose objects are pairs of objects of C,  related by a C-morphism into the given object. Morphisms of Dialectica spaces are similar to Chu space morphisms, but instead of an equality condition, they have an inequality condition.