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New posts in algebraic-geometry
locally free resolution for computation of Ext sheaves in Hartshorne Proposition 6.5 [duplicate]
algebraic-geometry
sheaf-cohomology
Recognizing a fiber product of schemes
abstract-algebra
geometry
algebraic-geometry
ring-theory
commutative-algebra
Map between formal neighbourhoods
algebraic-geometry
commutative-algebra
elliptic-curves
Demystifying the Magic Diagram
algebraic-geometry
category-theory
intuition
pullback
Quasiseparated if finitely covered by affines in appropriate way
algebraic-geometry
How can we prove that $D(f)\backsimeq\operatorname{Spec} A_f$?
algebraic-geometry
Prove that the upper half plane of Cartesian plane is not an affine variety
algebraic-geometry
commutative-algebra
Rational map of curves extends to a morphism if $C$ regular
algebraic-geometry
algebraic-curves
schemes
Algebraic geometry project ideas for high school students
algebraic-geometry
soft-question
Importance of Noether normalisation lemma
algebraic-geometry
commutative-algebra
Is the graph of morphism of projective varieties $X \rightarrow Y$ closed in $X \times Y$?
algebraic-geometry
projective-geometry
projective-schemes
Spectrum of $R[x]$
reference-request
algebraic-geometry
commutative-algebra
Genus 2 - Points at Infinity
algebraic-geometry
algebraic-curves
Can the completion of a domain be a non-domain?
algebraic-geometry
commutative-algebra
how to show that $V( Y-X^2 )$ is irreducible?
algebraic-geometry
Generic flatness on modules
algebraic-geometry
commutative-algebra
Why do we retain exactness when tensoring by $\mathcal{O}_C$ in Hartshorne, Lemma V.1.3?
algebraic-geometry
A plane algebraic curve with all four kinds of double points
algebraic-geometry
plane-curves
quasi-compact and compact in algebraic geometry
general-topology
algebraic-geometry
Parametrization of a conic and rational solutions
algebraic-geometry
diophantine-equations
conic-sections
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