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Tate module of an elliptic curve.

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#algebraic-geometry #elliptic-curves #schemes #arithmetic-geometry
324
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Ideal sheaf which is locally generated by sections.

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#sheaf-theory #schemes #ringed-spaces
243
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Making rigorous Mumford's argument about the sheaf of differentials on an Abelian Variety

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#algebraic-geometry #schemes #abelian-varieties
245
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What's an $\mathcal O_X$-algebra when $X= \operatorname{Spec} R$?

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#algebraic-geometry #schemes #affine-schemes
177
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Sheaves on a scheme compared with sheaves on its étale site

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#algebraic-geometry #schemes
232
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The étale topos is coherent: does the scheme need to be quasicompact?

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#compactness #schemes #topos-theory #etale-cohomology #grothendieck-topologies
140
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A naive question about the scheme theory: regard $\mathbb C^n$ as a scheme

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#algebraic-geometry #soft-question #schemes #affine-schemes
3.9k
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The twisting sheaf

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#algebraic-geometry #sheaf-theory #schemes
577
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How can an elliptic curve be regarded as a group scheme?

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#algebraic-geometry #elliptic-curves #schemes #group-schemes
201
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How to think of these different $K$-points of a scheme and Galois action

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#algebraic-geometry #galois-theory #group-actions #schemes
282
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Pullback of Kähler Differentials

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#algebraic-geometry #schemes #kahler-manifolds
146
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Morphism from product of schemes

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#algebraic-geometry #schemes
219
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Proposition II.3.2 of Hartshorne and quasi-compactness

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#algebraic-geometry #schemes
487
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Morphism between thick fibers of schemes extends to a neighbourhood

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#algebraic-geometry #schemes
1.5k
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What is an $R$-valued point on a scheme over $R$?

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#algebraic-geometry #schemes #affine-schemes

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