This is the home page of the Stacks project. It is an open source textbook and reference work on algebraic stacks and the algebraic geometry needed to define them. For more general information see our extensive about page.
The Stacks project is a collaborative effort. There is a list of people who have contributed so far. If you would like to know how to participate more can be found at the contribute page. To informally comment on the Stacks project visit the blog.
You can search the Stacks project by keywords:
If you on the other hand have a tag for an item (which can be anything, from section, lemma, theorem, etc.) in the Stacks project, you can look up the tag's page.
Items (sections, lemmas, theorems, etc.) in the Stacks project are referenced by their tag. See the tags explained page to learn more about tags and how to reference them in a LaTeX document.
Recent changes to the Stacks project
The Stacks project is hosted at GitHub, so you can browse the complete history there.