Skip to main content

All Questions

3 questions with no upvoted or accepted answers
Filter by
Sorted by
Tagged with
5 votes
0 answers
349 views

Algebraic spaces as quotients of schemes (Definition from wikipedia)

I think that wikipedia article on Algebraic spaces contains a serious content error in the part on the definition of Algebraic spaces as quotients of schemes and I would like to discuss if it is ...
user267839's user avatar
  • 6,038
4 votes
0 answers
97 views

Is there a concept of a map of Grothendieck sites having dense image?

Someone recently asked if one can talk about a map being etale dense just like one can talk about it being Zariski dense. My main question is: has anyone discussed such a notion? On a simple ...
David Corwin's user avatar
  • 15.4k
2 votes
0 answers
174 views

Finite étale morphism from a scheme to an algebraic space

Let $f : X \to Y$ be a finite, surjective étale morphism of algebraic spaces (say, of finite type over some noetherian scheme). Assume that $X$ is a scheme. Does this imply that $Y$ is a scheme? Is $Y$...
Mellon's user avatar
  • 197