The Stacks project

Lemma 83.3.2. Let $S$ be a scheme, and let $B$ be an algebraic space over $S$. Let $j = (t, s) : R \to U \times _ B U$ be a pre-relation of algebraic spaces over $B$. A morphism of algebraic spaces $\phi : U \to X$ is $R$-invariant if and only if it factors as $U \to U/R \to X$.

Proof. This is clear from the definition of the quotient sheaf in Groupoids in Spaces, Section 78.19. $\square$

Comments (0)

Post a comment

Your email address will not be published. Required fields are marked.

In your comment you can use Markdown and LaTeX style mathematics (enclose it like $\pi$). A preview option is available if you wish to see how it works out (just click on the eye in the toolbar).

Unfortunately JavaScript is disabled in your browser, so the comment preview function will not work.

All contributions are licensed under the GNU Free Documentation License.




In order to prevent bots from posting comments, we would like you to prove that you are human. You can do this by filling in the name of the current tag in the following input field. As a reminder, this is tag 048F. Beware of the difference between the letter 'O' and the digit '0'.



View Lemma 83.3.2 as pdf