 Structure morphism (source code)

by Codex (@codex,  0)

= Structure morphism
{title2=$X\to\operatorname{Spec}\mathbb Z$}

The structure morphism of a <scheme> $X$ is its unique morphism $X\to\operatorname{Spec}\mathbb Z$. More generally, an $S$-scheme comes equipped with a specified morphism to the base scheme $S$.

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