List questions from projective-space

Published on 25 Mar 2026 - 20:40

67

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Is there an algorithm for finding every isolated singular point on an algebraic variety, or a programming language that implements this?

Published on 23 Feb 2026 - 8:38

58

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Segre Embedding and lines on $x^2+y^2+z^2=1$ over $\mathbb{C}$

Published on 26 Mar 2026 - 1:06

77

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Geometric interpretation of dual Variety.

Published on 01 Aug 2023 - 20:33

223

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Tangents to a projective plane curve.

Published on 07 Aug 2023 - 20:53

48

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If $f: \mathbb CP^2 \rightarrow \mathbb CP^2$ is a homeomorphism, then $f(\mathbb CP^1)$ intersects $\mathbb CP^1$

Published on 21 Aug 2023 - 14:51

48

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If $X$ is a simply-connected $n$-dimensional CW complex, then any $f : X \rightarrow \mathbb RP^{n+1}$ is homotopic to a constant map

Published on 26 Mar 2026 - 20:41

94

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Quotient of projective group scheme by a finite group action

Published on 29 Mar 2026 - 12:11

110

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Prove that there is no holomorphic map $s: \mathbb{P}^n \to \mathbb{C}^{n+1} \setminus \{0\}$ with $p \circ s = \operatorname{id}$.

Published on 25 Sep 2023 - 11:13

42

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Cup product structure on $\mathbb{R}P^2$

Published on 28 Sep 2023 - 8:42

133

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Tangent spaces of $\Bbb P^1$

Published on 25 Mar 2026 - 19:03

97

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Intuition on fundamental group of $\mathbb R P^2.$

Published on 29 Mar 2026 - 2:36

125

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Global sections of $\mathcal{O}(k)$ are homogeneous polynomials

Published on 30 Sep 2023 - 13:53

42

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Symmetric algebra in the weighted projective setting

Published on 30 Sep 2023 - 18:50

66

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A question about an argument in Debarre's Higher dimensional algebraic geometry

Published on 07 Oct 2023 - 10:43

List Question

Example of (maximal) projective spectrum

Is there an algorithm for finding every isolated singular point on an algebraic variety, or a programming language that implements this?

Segre Embedding and lines on $x^2+y^2+z^2=1$ over $\mathbb{C}$

Geometric interpretation of dual Variety.

Tangents to a projective plane curve.

If $f: \mathbb CP^2 \rightarrow \mathbb CP^2$ is a homeomorphism, then $f(\mathbb CP^1)$ intersects $\mathbb CP^1$

If $X$ is a simply-connected $n$-dimensional CW complex, then any $f : X \rightarrow \mathbb RP^{n+1}$ is homotopic to a constant map

Quotient of projective group scheme by a finite group action

Prove that there is no holomorphic map $s: \mathbb{P}^n \to \mathbb{C}^{n+1} \setminus \{0\}$ with $p \circ s = \operatorname{id}$.

Cup product structure on $\mathbb{R}P^2$

Tangent spaces of $\Bbb P^1$

Intuition on fundamental group of $\mathbb R P^2.$

Global sections of $\mathcal{O}(k)$ are homogeneous polynomials

Symmetric algebra in the weighted projective setting

A question about an argument in Debarre's Higher dimensional algebraic geometry

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