Loading web-font TeX/Caligraphic/Regular

The Stacks project

Definition 7.40.2. Let \mathcal{C} be a site.

  1. We say an object U of \mathcal{C} is weakly contractible if the equivalent conditions of Lemma 7.40.1 hold.

  2. We say a site has enough weakly contractible objects if every object U of \mathcal{C} has a covering \{ U_ i \to U\} with U_ i weakly contractible for all i.

  3. More generally, if P is a property of objects of \mathcal{C} we say that \mathcal{C} has enough P objects if every object U of \mathcal{C} has a covering \{ U_ i \to U\} such that U_ i has P for all i.


Comments (0)


Your email address will not be published.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.