The Stacks project

Lemma 26.20.2. Let $f : X \to S$ be a morphism of schemes.

  1. If $f$ is universally closed then specializations lift along any base change of $f$, see Topology, Definition 5.19.4.

  2. If $f$ is quasi-compact and specializations lift along any base change of $f$, then $f$ is universally closed.

Proof. Part (1) is a direct consequence of Topology, Lemma 5.19.7. Part (2) follows from Lemmas 26.19.8 and 26.19.3. $\square$

Comments (0)

There are also:

  • 2 comment(s) on Section 26.20: Valuative criterion for universal closedness

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Your email address will not be published.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 01KC. Beware of the difference between the letter 'O' and the digit '0'.