List questions from projective-space

Published on 18 Sep 2015 - 10:45

30

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Set of unordered $n$-tuples of points of $\mathbb{CP}^1$ can be identified with $\mathbb{CP}^n$?

Published on 21 Sep 2015 - 15:17

168

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Dimension of a linear space in $\mathbb{P}^{n}$ (Schubert Calculus)

Published on 25 Mar 2026 - 7:43

4.8k

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Homotopy groups of $\mathbb{RP}^\infty$, $\mathbb{CP}^\infty$.

Published on 28 Sep 2015 - 16:11

722

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Struggling to understand real projective space

Published on 30 Mar 2026 - 10:08

507

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Two distinct planes in a projective space intersect in a line?

Published on 05 Oct 2015 - 10:52

482

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Even dimensional real projective spaces cannot be combed

Published on 30 Mar 2026 - 10:44

158

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Dimension of the space of cubic polynomials over $\mathbb{P}^5$ which vanish on the Veronese surface.

Published on 08 Oct 2015 - 17:23

193

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How to show that this set is a projective variety?

Published on 09 Oct 2015 - 18:04

65

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Does intersection of smooth divisors satisfy Serre $S_2$ criterion?

Published on 21 Mar 2026 - 12:49

221

Views

Projective transformation in $\mathbb{P}^1$

Published on 18 Mar 2026 - 23:52

233

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Quotient of $\mathbb{P}^n\times\cdots\times \mathbb{P}^n$ by $S_d$: is it projective?

Published on 23 Mar 2026 - 22:14

748

Views

Any set of $d$ points in projective space is the zero locus of polynomials of degree $d - 1$

Published on 16 Oct 2015 - 16:49

504

Views

Are inhomogeneous coordinates ... COORDINATES?

Published on 21 Oct 2015 - 14:33

231

Views

Calculating Hom in derived category

Published on 29 Mar 2026 - 20:58

List Question

Finite algebraic variety of projective space

Set of unordered $n$-tuples of points of $\mathbb{CP}^1$ can be identified with $\mathbb{CP}^n$?

Dimension of a linear space in $\mathbb{P}^{n}$ (Schubert Calculus)

Homotopy groups of $\mathbb{RP}^\infty$, $\mathbb{CP}^\infty$.

Struggling to understand real projective space

Two distinct planes in a projective space intersect in a line?

Even dimensional real projective spaces cannot be combed

Dimension of the space of cubic polynomials over $\mathbb{P}^5$ which vanish on the Veronese surface.

How to show that this set is a projective variety?

Does intersection of smooth divisors satisfy Serre $S_2$ criterion?

Projective transformation in $\mathbb{P}^1$

Quotient of $\mathbb{P}^n\times\cdots\times \mathbb{P}^n$ by $S_d$: is it projective?

Any set of $d$ points in projective space is the zero locus of polynomials of degree $d - 1$

Are inhomogeneous coordinates ... COORDINATES?

Calculating Hom in derived category

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