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For questions related to the mathematical notion of site, which among others generalizes the notion of topological space. For questions on internet-sites, use online-resources, but note that these questions need to be very specific to research-level mathematics to be on-topic.

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Non-invertible map between principal bundles only locally trivial in a supercanonical Grothe...

And so here we get to the point: according to the question Sites which are stacks over themselves, the codomain fibration of a site $(S,J)$ is a prestack on that site (i.e. the hom-presheaves are sheaves …
David Roberts's user avatar
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