# Category:Duality theories

From HandWiki

Here is a list of articles in the category **Duality theories** of the Philosophy portal. The idea of mathematical duality was first noticed as projective duality. There it appears as the idea of interchanging dimension *k* and codimension *k*+1 in propositions of projective geometry. A large number of duality theories have now been created in mathematics, ranging as far as optimization theory and theoretical physics.

## Subcategories

This category has the following 2 subcategories, out of 2 total.

### A

- Adjoint functors (21 P)

### C

## Pages in category "Duality theories"

The following 74 pages are in this category, out of 74 total.