List questions from projective-space

Published on 26 Mar 2026 - 1:07

54

Views

Show a map from $\mathbb{P}^2$ to $\mathbb{P}^2$ is injective

Published on 15 Jun 2021 - 8:56

90

Views

Can a non homogenous polynomial give a projective variety?

Published on 19 Jun 2021 - 9:58

29

Views

Homogeneous coordinates in the Projective line $\mathbb{P}_1(\mathbb{Q})$

Published on 21 Jun 2021 - 19:03

577

Views

Computing the homology group of the real projective plane using Mayer-Vietoris sequence.

Published on 23 Feb 2026 - 13:44

764

Views

Coherent Sheaves on Smooth Curves

Published on 27 Mar 2026 - 3:00

55

Views

$\mathbb C P^n - p \simeq \mathbb C P^{n-1}$ if $p \in \text {int} (D^{2n}).$

Published on 23 Feb 2026 - 15:16

127

Views

Prove that the complex projective line is a union of two preimages of closed unit disks in $\mathbb{C}$.

Published on 30 Jun 2021 - 12:48

84

Views

Question on a construction of the Klein-Beltrami model

Published on 05 Jul 2021 - 2:36

70

Views

Multiplicity of Points on Planar Projective Curve

Published on 05 Jul 2021 - 21:56

78

Views

Question on finding $\pi_1 (\mathbb R P^n),$ for $n \geq 2.$

Published on 10 Jul 2021 - 19:20

205

Views

A question about a nondegenerate smooth curve in $\Bbb P^n$ of degree $n$

Published on 16 Jul 2021 - 9:03

274

Views

Find an explicit quasi-smooth embedding $X_{38} \subset \mathbb P(5, 6, 8, 19)$

Published on 23 Feb 2026 - 8:28

88

Views

A bitangent hyperplane to a projective curve

Published on 27 Mar 2026 - 5:36

282

Views

Asymmetric Numeral Systems Arithmetic

Published on 28 Mar 2026 - 16:56

List Question

Proving an identity involving pushforward

Show a map from $\mathbb{P}^2$ to $\mathbb{P}^2$ is injective

Can a non homogenous polynomial give a projective variety?

Homogeneous coordinates in the Projective line $\mathbb{P}_1(\mathbb{Q})$

Computing the homology group of the real projective plane using Mayer-Vietoris sequence.

Coherent Sheaves on Smooth Curves

$\mathbb C P^n - p \simeq \mathbb C P^{n-1}$ if $p \in \text {int} (D^{2n}).$

Prove that the complex projective line is a union of two preimages of closed unit disks in $\mathbb{C}$.

Question on a construction of the Klein-Beltrami model

Multiplicity of Points on Planar Projective Curve

Question on finding $\pi_1 (\mathbb R P^n),$ for $n \geq 2.$

A question about a nondegenerate smooth curve in $\Bbb P^n$ of degree $n$

Find an explicit quasi-smooth embedding $X_{38} \subset \mathbb P(5, 6, 8, 19)$

A bitangent hyperplane to a projective curve

Asymmetric Numeral Systems Arithmetic

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