nLab
fppf site

Contents

Definition

Fix some scheme SS.

Definition

the fppf-site (over SS) is the site

This appears as (de Jong, def. 27.7.1, def 27.7.6, lemma 27.7.11).

Remark

The abbreviation “fppf” is for fidèlement plat de présentation finie : faithfully flat and of finite presentation.

But notice that it is common practice, as in the above definition, to require only local finite presentability.

fpqc-site \to fppf-site \to syntomic site \to étale site \to Nisnevich site \to Zariski site

References

Chaper 27.7 in

Revised on September 5, 2011 09:40:52 by Urs Schreiber (89.204.153.80)