List questions from schemes

Published on 30 Nov 2012 - 17:01

613

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Set of points where ring of germs is reduced is open

Published on 02 Dec 2012 - 12:19

1.2k

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If $X$ is separated over $\operatorname{Spec} \Bbb Z$, is it separated over any other scheme?

Published on 04 Dec 2012 - 20:30

289

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Which local ringed spaces are schemes?

Published on 09 Apr 2026 - 13:58

562

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Basic definition of Inverse Limit in sheaf theory / schemes

Published on 09 Apr 2026 - 0:56

332

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places of function field and closed point of a scheme

Published on 09 Apr 2026 - 6:40

2.8k

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Why is surjectivity stable under base change?

Published on 19 Dec 2012 - 14:25

173

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If $X\times C$ is isomorphic to $Y\times C$, does it follow that $X$ is isomorphic to $Y$

Published on 26 Mar 2026 - 4:36

795

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Intersection of quasi-compact open subsets of an affine scheme

Published on 22 Dec 2012 - 18:57

2.2k

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The image of a proper scheme is closed

Published on 27 Dec 2012 - 16:07

1.8k

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Intuition on base change of schemes

Published on 08 Apr 2026 - 17:06

261

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Proof of $X(\mathcal{O}_K)\simeq X_K(K)$

Published on 01 Jan 2013 - 15:38

193

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The image of a certain morphism in $\mathbb{A}^1_k$ is a closed point

Published on 01 Jan 2013 - 18:32

262

Views

Exercise on locally ringed spaces

Published on 07 Apr 2026 - 5:31

560

Views

$f(X)$ dense in $Spec A$

Published on 09 Apr 2026 - 9:01

List Question

Hom between 2 schemes

Set of points where ring of germs is reduced is open

If $X$ is separated over $\operatorname{Spec} \Bbb Z$, is it separated over any other scheme?

Which local ringed spaces are schemes?

Basic definition of Inverse Limit in sheaf theory / schemes

places of function field and closed point of a scheme

Why is surjectivity stable under base change?

If $X\times C$ is isomorphic to $Y\times C$, does it follow that $X$ is isomorphic to $Y$

Intersection of quasi-compact open subsets of an affine scheme

The image of a proper scheme is closed

Intuition on base change of schemes

Proof of $X(\mathcal{O}_K)\simeq X_K(K)$

The image of a certain morphism in $\mathbb{A}^1_k$ is a closed point

Exercise on locally ringed spaces

$f(X)$ dense in $Spec A$

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