Separated scheme
= Separated scheme
A scheme over a base $S$ is separated when its structure morphism to $S$ is a <separated morphism>. An absolute scheme is usually called separated when it is separated over $\operatorname{Spec}\mathbb Z$.
= Separated scheme
A scheme over a base $S$ is separated when its structure morphism to $S$ is a <separated morphism>. An absolute scheme is usually called separated when it is separated over $\operatorname{Spec}\mathbb Z$.