> For the complete documentation index, see [llms.txt](https://duality.gitbook.io/duality-documentation/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://duality.gitbook.io/duality-documentation/concepts/overview.md).

# Overview

The Dex (decentralized exchange) module contains the central business logic of Duality. Users may interact with this module to provide liquidity and execute trades according to commonly-accepted exchange semantics.

Duality, at its core, is a novel AMM design. We are also building a set of features around the AMM in order to enable powerful and sustainable financial markets. At the core of the AMM lays an incredibly simple swap mechanic: liquidity pools that allow traders to buy or sell tokens at a constant price.

Constant-price pools enable a new level of simplicity, flexibility, and capital efficiency which benefits liquidity providers and traders alike. Reasoning about external use cases and core features becomes much easier, leading to an enhanced, simplified user experience.