Stacks Project

The Stacks Project is an open source collaborative mathematics textbook writing project with the aim to cover "algebraic stacks and the algebraic geometry needed to define them".^[1][2][3][4] As of 23 October 2024^[update], the book consists of 116 chapters^[5] (excluding the license and index chapters) spreading over 7500 pages. The maintainer of the project, who reviews and accepts the changes, is Aise Johan de Jong.^[1][2]