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15
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Local ring after base change

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#algebraic-geometry #schemes
163
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Foliations and groupoids in algebraic geometry

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#algebraic-geometry #schemes #groupoids #foliations
344
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Calculating Euler Characteristic of Closed Subscheme

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#algebraic-geometry #schemes #sheaf-cohomology #projective-schemes
67
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Understanding $\mathcal{O}_{\text{Spec A}} (D(f))$

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#algebraic-geometry #schemes
501
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Residue field at a point on a curve in a surface

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#algebraic-geometry #ring-theory #commutative-algebra #schemes
226
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Quotient of a scheme by an (algebraic) group action need not be a scheme counterexample.

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#algebraic-geometry #schemes
207
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Does $\mathcal{O}_X\text{-Mod}$ have enough projectives?

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#homological-algebra #sheaf-theory #schemes
118
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Nakajima's Hilbert Polynomial

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#algebraic-geometry #schemes #hilbert-polynomial
372
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What is the structure sheaf of an $S$-scheme?

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#algebraic-geometry #schemes
93
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On the support of sheaf of modules or quasi-coherent sheaves over ringed spaces

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#commutative-algebra #sheaf-theory #schemes #coherent-sheaves #quasicoherent-sheaves
407
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localization and tensor product of algebras

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#abstract-algebra #algebraic-geometry #ring-theory #commutative-algebra #schemes
363
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(Connected) non-contractible schemes

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#general-topology #algebraic-geometry #algebraic-topology #schemes #affine-schemes
284
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How a finite extension of transcendence degree $1$ extensions induces a morphism of curves

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#algebraic-geometry #algebraic-curves #schemes #valuation-theory #dedekind-domain
127
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Preimage of elementary Open Set $D(g)$ Tensor Product

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#algebraic-geometry #ring-theory #schemes
206
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Examples of finite group schemes over a field which are not affine

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#group-theory #commutative-algebra #schemes #group-schemes

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