red_trumpet's user avatar
red_trumpet's user avatar
red_trumpet's user avatar
red_trumpet
  • Member for 8 years
  • Last seen this week
  • Germany
14 votes
Accepted

What is a simple definition of the pullback of a section?

8 votes
Accepted

Proof of Serre Duality in Hartshorne

8 votes
Accepted

Confusion on the definition of a complex structure

6 votes

Subbundle of a pullback is not the pullback of a subbundle

5 votes
Accepted

Strengthening Ax-Grothendieck

5 votes
Accepted

Terminology confusion in complex geometry (hermitian geometry)

5 votes
Accepted

what does U \ {v} means?

5 votes
Accepted

Hartshorne Exercise II 3.22 (a) - Dimensions of the Fibres of a morphism

4 votes
Accepted

How to use Nullstellensatz to prove Study’s lemma

4 votes

Elaboration of an example on the independence of the conditions of a subspace of a vector space.

4 votes

Is there any easy proof of Brouwer's fixed point theorem?

4 votes
Accepted

Hartshorne Lemma (II.4.5): f(X) is closed iff stable under specialization

4 votes
Accepted

Concept question about the local defining function for the irreducible hypersurface $Y$

4 votes
Accepted

Geometric genus of projective bundle over a scheme?

4 votes
Accepted

Omission of locality axiom in some definitions of sheafs

4 votes
Accepted

Considering Long exact sequence of cohomology

4 votes
Accepted

Some (maybe) basic estimate of expected values involving brownian motion

4 votes

Are the basis of kernel space and the basis of image space independent for full rank linear transformation?

4 votes

Product decomposition into semisimple and unipotent parts of a connected, solvable, nilpotent Algebraic group $G$ (A. Borel’s LAG)

4 votes
Accepted

Entire function is a polynomial

4 votes
Accepted

Stalk of the ramification divisor

3 votes
Accepted

A possible criterion for a function on a complex analytic space to be holomorphic

3 votes

Are all parametrization via homogeneous polynomials rational curves?

3 votes
Accepted

Support and irreducible components of a divisor

3 votes

Does there always exist atlest two sequences that converge to the same limit?

3 votes
Accepted

Unicity in Hartshorne Corollary II.7.15

3 votes
Accepted

surjective polynomial map implies submersion?

3 votes

Is this space Noetherian?

3 votes
Accepted

trying to understand complex manifold vector bundle

3 votes
Accepted

$\partial \bar \partial$-lemma for $d$-exact differential form.

1
2 3 4 5
8