Armando j18eos's user avatar
Armando j18eos's user avatar
Armando j18eos's user avatar
Armando j18eos
  • Member for 9 years, 1 month
  • Last seen more than a month ago
25 votes
Accepted

Hartshorne or Vakil's notes

8 votes

When can stalks be glued to recover a sheaf?

7 votes

Lie Groups/Lie algebras to algebraic groups

7 votes

The vanishing scheme of for a graded ring generated by elements of degree 1 (Vakil 4.5.P)

6 votes
Accepted

Let $X$ be a K3 surface, show that $H_1(X,\mathbb Z)=0$

6 votes
Accepted

What is an algebraic curve?

6 votes
Accepted

Is this plane curve irreducible?

6 votes
Accepted

Vakil's definition of smoothness -- what happens at non-closed points?

6 votes
Accepted

Endomorphism vector bundle isomorphic to the adjoint bundle of its frame bundle?

4 votes
Accepted

What's the difference between $\mathbb{A}^n$ and $\mathbb{A}^{n+1}$?

4 votes
Accepted

All the lines on the Segre quadric

4 votes

Why is a Zariski closed set compact under the Zariski topology?

4 votes

When are flag manifolds compact?

4 votes

Reference Request for Fibre Bundle Theory from the Smooth Manifold Point of View

4 votes

basic reference for stacks

3 votes
Accepted

injective morphism of schemes but non-separated?

3 votes
Accepted

Please give me some advice on references of complex geometry

3 votes
Accepted

Dimension of a product of projective varieties

3 votes

Can a complex manifold that is not a Calabi-Yau manifold be homeomorphic to a Calabi-Yau manifold?

3 votes

Confusion about elements of the stalk of the direct image sheaf

3 votes

Example of nef and big, not ample

3 votes
Accepted

Levi Civita connection intuition and motivation

3 votes
Accepted

If $X$ is a closed set in $\mathbb{A}^n$, is $\mathcal O_X$ the inverse image sheaf of $\mathcal O_{\mathbb{A}^n}$?

3 votes
Accepted

Minimal prime ideals of $\mathcal O_{X,x}$ correspond to irreducible components of $X$ containing $x$

3 votes
Accepted

Relation between stalks of twisted sheaf and structure sheaf

3 votes
Accepted

How do we obtain the twisted cubic?

3 votes

Why a sheaf is an object that permits to get global information from local one?

2 votes
Accepted

Borel subalgebras inside the grassmannian

2 votes

$S^1$ cannot be the zero locus of polynomials: is this argument correct?

2 votes
Accepted

Support and stalks at generic points

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