List questions from projective-space

Published on 26 Mar 2026 - 14:20

174

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Showing a map from projective space can't be extended

Published on 25 Mar 2026 - 15:41

614

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Finding a differential form on the real projective space

Published on 23 Feb 2026 - 8:22

1k

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linear subspaces of a projective space

Published on 26 Mar 2026 - 18:30

155

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If $m_P(F)=r\geq 0$, then for all but finite lines $L$ through $P$, $\# L\cap F=n-r+1$

Published on 09 Jan 2020 - 23:51

99

Views

A proof that every algebraic curve embeds in $\mathbb{P}^3(\mathbb{C})$

Published on 11 Jan 2020 - 18:08

257

Views

Loops of the projective plane embedded in the projective space

Published on 14 Jan 2020 - 1:51

333

Views

$\mathbb{RP}^1$ is diffeomorphic to $S^1$: how to prove it explicitely.

Published on 17 Jan 2020 - 15:37

420

Views

Projections of the standard twisted cubic on $\mathbb{P}^2$ (Harris 3.8)

Published on 20 Jan 2020 - 19:19

549

Views

An embedding of $\mathbb{RP}^2$ into $\mathbb{R}^4$

Published on 20 Jan 2020 - 19:38

31

Views

Correct notation for points and coordinates

Published on 22 Jan 2020 - 0:44

44

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Motivation for considering the construction $Spec((S_{\bullet})_f)_0$

Published on 22 Jan 2020 - 9:19

83

Views

Intersection of algebraic curves in the complex projective plane

Published on 22 Jan 2020 - 18:48

139

Views

Are open $\mathbb{G}_m$-invariant subschemes of an affine scheme precisely the homogeneous radical ideals of its coordinate ring?

Published on 25 Mar 2026 - 17:42

86

Views

Relation between affine restriction and projective closures.

Published on 28 Jan 2020 - 23:21

List Question

Algebraic de Rham cohomology for projective hypersurfaces degree d

Showing a map from projective space can't be extended

Finding a differential form on the real projective space

linear subspaces of a projective space

If $m_P(F)=r\geq 0$, then for all but finite lines $L$ through $P$, $\# L\cap F=n-r+1$

A proof that every algebraic curve embeds in $\mathbb{P}^3(\mathbb{C})$

Loops of the projective plane embedded in the projective space

$\mathbb{RP}^1$ is diffeomorphic to $S^1$: how to prove it explicitely.

Projections of the standard twisted cubic on $\mathbb{P}^2$ (Harris 3.8)

An embedding of $\mathbb{RP}^2$ into $\mathbb{R}^4$

Correct notation for points and coordinates

Motivation for considering the construction $Spec((S_{\bullet})_f)_0$

Intersection of algebraic curves in the complex projective plane

Are open $\mathbb{G}_m$-invariant subschemes of an affine scheme precisely the homogeneous radical ideals of its coordinate ring?

Relation between affine restriction and projective closures.

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