A morphism of schemes (and more general objects, e.g., stacks) that is quasicompact and quasiseparated.
Quasicompact quasiseparated schemes are characterized by a property that they admit an analogue (of sorts) of a good cover: such schemes are precisely those schemes that can be covered by finitely many affine opens such that the intersection of any two opens can itself be covered by finitely many affine opens.
Created on December 29, 2023 at 17:41:35. See the history of this page for a list of all contributions to it.