The Stacks project

Definition 7.12.2. We say that the topology on a site $\mathcal{C}$ is weaker than the canonical topology, or that the topology is subcanonical if all the coverings of $\mathcal{C}$ are universal effective epimorphisms.

Comments (2)

Comment #5416 by on

Maybe it's worth giving the examples that appear in the Stacks project: fpqc and anything coarser than it, for instance.

Comment #5643 by on

Thanks for the suggestion. Going to leave this for now.

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View Definition 7.12.2 as pdf