User gigi

30 votes

1 answer

1k views

How to prove that the solution to $x^{x+1}=(x+1)^{x}$ is transcendental?

asked Mar 9, 2021 at 20:17

13 votes

2 answers

965 views

Elementary proof that $\mathbb{R}^3 \setminus \{p_1,\dots,p_n\}$ is not homeomorphic to $\mathbb{R}^3$

asked Jan 6, 2021 at 17:55

7 votes

1 answer

364 views

Strict transform of a tangent curve under blow-up

asked Oct 14, 2020 at 15:20

6 votes

2 answers

499 views

Geometric meaning of coherent sheaves $\mathcal{F} \otimes \mathcal{O}_{\mathbb{P}^n}(d)$ over $\mathbb{P}^n$

asked Jun 16, 2021 at 12:33

5 votes

2 answers

214 views

Surface of type $(2,2)$ on the Segre cubic scroll $\mathbb{P}^1 \times \mathbb{P}^2 \subset \mathbb{P}^5$

asked Nov 27, 2020 at 14:42

5 votes

1 answer

417 views

Action of the symmetric group $S_3$ on an elliptic curve $E$ defined over $\mathbb{Z}$

asked Jan 9, 2021 at 16:49

4 votes

0 answers

181 views

Example of a computation of the volume of a subvariety in projective space $\mathbb{P}^n$

asked Oct 13, 2020 at 16:10

4 votes

0 answers

108 views

Tensors of minimal rank in Schur modules $S_{\lambda}V \subset V^{\otimes |\lambda|}$

asked Apr 13, 2021 at 14:10

4 votes

1 answer

179 views

Generalization of $\lim_{n \rightarrow \infty} \prod_{i=1}^{n}\frac{2i-1}{2i}$ for a character $\chi:\mathbb{Z}/s \mathbb{Z} \rightarrow \mathbb{C}^*$

asked Dec 30, 2020 at 19:07

4 votes

1 answer

268 views

Normal bundle to Veronese varieties $v_d(\mathbb{P}^n)$ into $\mathbb{P}(H^0(\mathcal{O}_{\mathbb{P}^n}(d)))$

asked Jul 15, 2021 at 22:00

3 votes

1 answer

132 views

Varieties in the $\mathit{GL}(V)$-module $S_{\lambda}V$

asked Oct 15, 2020 at 12:52

2 votes

0 answers

109 views

Local complete intersection on a smooth variety

asked Sep 26, 2019 at 13:44

2 votes

1 answer

243 views

Singular locus of a linear system of hyperplane sections

asked Dec 17, 2019 at 17:03

2 votes

0 answers

155 views

Limit of infinite power tower $\lim_{n \rightarrow +\infty}\frac{a_0^{a_1^{a_2^{^{.^{.^{a_{n}}}}}}}}{b_0^{b_1^{b_2^{^{.^{.^{b_{n}}}}}}}}$

asked Jan 1, 2021 at 22:36

2 votes

1 answer

244 views

Help about "Varieties with small Dual Varieties" by L.Ein

asked Jan 7, 2021 at 20:22

2 votes

1 answer

304 views

Trivial subbundle of universal bundle on the Grassmannian $\mathbb{G}(k,n)$

asked Jun 16, 2021 at 12:11

2 votes

1 answer

199 views

Equivalence of sequences of blowups of $\mathbb{P}^3$

asked Nov 12, 2021 at 19:14

2 votes

0 answers

162 views

Is the ideal of the Veronese variety $V_{d,n}$ generated by quadrics?

asked Mar 8, 2022 at 11:05

2 votes

1 answer

109 views

Sheaves on families of genus 2 curves in Hassett's paper

asked Mar 10, 2022 at 14:41

2 votes

0 answers

151 views

Question about an example of a conic bundle in a paper by Kollár

asked Jun 6, 2022 at 14:38

2 votes

1 answer

94 views

Class of the discriminant of a conic bundle

asked Jun 13, 2022 at 12:54

2 votes

0 answers

75 views

Integers solutions of products of truncated Riemann zeta functions

asked Nov 8, 2022 at 17:47

1 vote

0 answers

119 views

Trisecant lines to curves in $\mathbb{P}^3$: a reference request

asked Dec 1, 2020 at 17:10

1 vote

0 answers

403 views

Embeddings of Hirzebruch surfaces $\mathbb{P}(\mathcal{O}_{\mathbb{P}^1}\oplus\mathcal{O}_{\mathbb{P}^1}(n))$

asked Oct 15, 2020 at 16:14

1 vote

0 answers

133 views

Cubic surface in $\mathbb{P}^3$ singular along a line

asked Nov 26, 2020 at 22:36

0 votes

0 answers

111 views

Problem in calculating the global sections of $\mathcal{O}_{\mathbb{P}^3}(d)\otimes \mathcal{I}_Z$

asked Nov 13, 2021 at 13:02

Stack Exchange Network

26 Questions

How to prove that the solution to $x^{x+1}=(x+1)^{x}$ is transcendental?

Elementary proof that $\mathbb{R}^3 \setminus \{p_1,\dots,p_n\}$ is not homeomorphic to $\mathbb{R}^3$

Strict transform of a tangent curve under blow-up

Geometric meaning of coherent sheaves $\mathcal{F} \otimes \mathcal{O}_{\mathbb{P}^n}(d)$ over $\mathbb{P}^n$

Surface of type $(2,2)$ on the Segre cubic scroll $\mathbb{P}^1 \times \mathbb{P}^2 \subset \mathbb{P}^5$

Action of the symmetric group $S_3$ on an elliptic curve $E$ defined over $\mathbb{Z}$

Example of a computation of the volume of a subvariety in projective space $\mathbb{P}^n$

Tensors of minimal rank in Schur modules $S_{\lambda}V \subset V^{\otimes |\lambda|}$

Generalization of $\lim_{n \rightarrow \infty} \prod_{i=1}^{n}\frac{2i-1}{2i}$ for a character $\chi:\mathbb{Z}/s \mathbb{Z} \rightarrow \mathbb{C}^*$

Normal bundle to Veronese varieties $v_d(\mathbb{P}^n)$ into $\mathbb{P}(H^0(\mathcal{O}_{\mathbb{P}^n}(d)))$

Varieties in the $\mathit{GL}(V)$-module $S_{\lambda}V$

Local complete intersection on a smooth variety

Singular locus of a linear system of hyperplane sections

Limit of infinite power tower $\lim_{n \rightarrow +\infty}\frac{a_0^{a_1^{a_2^{^{.^{.^{a_{n}}}}}}}}{b_0^{b_1^{b_2^{^{.^{.^{b_{n}}}}}}}}$

Help about "Varieties with small Dual Varieties" by L.Ein

Trivial subbundle of universal bundle on the Grassmannian $\mathbb{G}(k,n)$

Equivalence of sequences of blowups of $\mathbb{P}^3$

Is the ideal of the Veronese variety $V_{d,n}$ generated by quadrics?

Sheaves on families of genus 2 curves in Hassett's paper

Question about an example of a conic bundle in a paper by Kollár

Class of the discriminant of a conic bundle

Integers solutions of products of truncated Riemann zeta functions

Trisecant lines to curves in $\mathbb{P}^3$: a reference request

Embeddings of Hirzebruch surfaces $\mathbb{P}(\mathcal{O}_{\mathbb{P}^1}\oplus\mathcal{O}_{\mathbb{P}^1}(n))$

Cubic surface in $\mathbb{P}^3$ singular along a line

Problem in calculating the global sections of $\mathcal{O}_{\mathbb{P}^3}(d)\otimes \mathcal{I}_Z$