user avatar
user avatar
user avatar
JBorger
  • Member for 12 years, 7 months
  • Last seen more than a month ago
120 votes

How has modern algebraic geometry affected other areas of math?

71 votes

The inverse Galois problem, what is it good for?

47 votes

Is there a universal property for Witt vectors?

46 votes

Consequences of not requiring ring homomorphisms to be unital?

41 votes
Accepted

Commutative rings to algebraic spaces in one jump?

37 votes
Accepted

Why are noetherian rings such natural objects in algebraic geometry?

27 votes

What are some slogans that express mathematical tricks?

22 votes

Why is this not an algebraic space?

20 votes

Problems where we can't make a canonical choice, solved by looking at all choices at once

18 votes

Is the moduli space of curves defined over the field with one element?

16 votes
Accepted

Exact sequence of monoids

15 votes
Accepted

Is an ordinary scheme in Borger's Absolute Geometry the same as a "scheme over F1" with a map to Spec(Z)?

15 votes
Accepted

Applications of algebraic geometry over a field with one element

14 votes

When and why did the postdoctoral position originate?

14 votes

Precise definition of a scheme (Key question: How to define an open subfunctor without resorting to classical scheme theory)

14 votes

Why does Neeman avoid t-structures?

14 votes

What's the easiest example of a morphism of topoi that is not from that of a site?

13 votes
Accepted

Is the (regular) inverse Galois problem known for the field C(x,y)?

13 votes

How much of scheme theory can you visualize?

12 votes
Accepted

Why does the Gamma function satisfy a functional equation?

12 votes
Accepted

Is every Adams ring morphism a lambda-ring morphism?

12 votes
Accepted

On a Theorem of Fontaine

11 votes

Ring with three binary operations

11 votes
Accepted

Descent of functions along finite birational morphisms

11 votes
Accepted

When is a localization of a commutative ring finitely generated as an algebra?

10 votes
Accepted

How to visualize a Witt vector?

9 votes
Accepted

$\lambda$-ring structure defined for a graded ring in Fulton–Lang's book

9 votes

Are there Néron models over higher dimensional base schemes?

8 votes
Accepted

Endofunctors of CRing which give schemes when composed with schemes?

8 votes

Criteria for ghost-Witt vectors: looking for history and references