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TheWanderer
  • Member for 10 years, 5 months
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12 votes
1 answer
1k views

Relations between the fiber of a vector bundle and the stalk of the corresponding sheaf

12 votes
1 answer
2k views

De Rham Cohomology of the tangent bundle of a manifold

8 votes
1 answer
299 views

Fundamental group of real $3\times 3$ matrices with rank $1$

7 votes
2 answers
325 views

Not every complex manifold is of the form $X_{an}$ where $X$ is some algebraic variety

6 votes
1 answer
1k views

Riemann-Hurwitz formula generalization in higher dimension

6 votes
1 answer
280 views

Dessins d'enfants and real algebraic curves

6 votes
1 answer
776 views

Miranda's Exercise on the Jacobian of a complex torus

6 votes
1 answer
321 views

Miranda Pag. 66 Plugging Holes

6 votes
2 answers
1k views

Is this map a homeomorphism onto its image?

6 votes
1 answer
218 views

Cyclic Cover of the Projective Line

5 votes
0 answers
292 views

Can $\operatorname{Spec}(A)$ be expressed as an inverse limit?

5 votes
1 answer
62 views

Is composition of extremal epimorphisms always extremal?

4 votes
2 answers
284 views

Equivalence of categories and toposes

4 votes
0 answers
68 views

Topological Concrete Categories: Axiomatizations

4 votes
3 answers
374 views

Functions sending subgroups to subgroups

4 votes
1 answer
381 views

Exercise on fundamental groups

4 votes
1 answer
804 views

Exercise on Complex Tori

4 votes
1 answer
1k views

Theta function: Absolute convergence

4 votes
2 answers
182 views

Solving $\sum\limits_{k=0}^n k2^k \binom{n}{k}$

4 votes
6 answers
83 views

$\lim\limits_{N \to +\infty} \sqrt{N+1} \log\left (1+\frac{x}{N+1}\right)$

4 votes
6 answers
276 views

Differential equation $y''=y^2$

4 votes
1 answer
2k views

Quotient of the linear group by the subgroup of matrices with positive determinant

3 votes
3 answers
1k views

Fundamental group of a triangle with the three vertices identified?

3 votes
1 answer
3k views

Fibonacci sequence as basis of a vector space

3 votes
1 answer
101 views

Faithful action of $\operatorname{Gal}(\overline{\mathbb{Q}}/\mathbb{Q})$ on dessins of genus $0$

3 votes
1 answer
62 views

If a property is self-dual and holds for a lattice, does it hold for its dual

3 votes
1 answer
128 views

Amoeba of a line in the plane: An example

3 votes
1 answer
996 views

$\operatorname{Spec}\mathbb{K}[x,y,z]/\langle x^2-yz \rangle$ is normal and singular

3 votes
0 answers
56 views

Miranda's book lemma 4.12 pag. 159

3 votes
1 answer
1k views

Computation of the support of a sheaf

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