New posts in algebraic-geometry

The Picard Group of the Affine line with double origin

algebraic-geometry

Stalk of structure sheaf on fiber product of schemes

algebraic-geometry commutative-algebra

Intersection of all maximal ideals containing a given ideal

algebraic-geometry commutative-algebra

Can this quick way of showing that $K[X,Y]/(Y-X^2)\cong K[X]$ be turned into a valid argument?

abstract-algebra algebraic-geometry polynomials ring-theory

Introduction to sheaves using categorical approach

algebraic-geometry reference-request category-theory sheaf-theory

For local ring $R$, does funcotor $\operatorname{Hom( Spec}R, X)$ characterize scheme $X$?

abstract-algebra algebraic-geometry ring-theory local-rings

Dominant rational maps

algebraic-geometry

What is the zero subscheme of a section

algebraic-geometry definition sheaf-theory schemes

An open subset of an irreducible set is dense.

algebraic-geometry

An example of a scheme in the language of schemes

intuition algebraic-geometry

Is a divisor in the hyperplane class necessarily a hyperplane divisor?

algebraic-geometry algebraic-curves projective-geometry

Why did Serre choose coherent sheaves?

algebraic-geometry sheaf-theory sheaf-cohomology coherent-sheaves quasicoherent-sheaves

Topics in Differential geometry $\cap$ Algebraic geometry

algebraic-geometry differential-geometry soft-question

Examples of $\mathcal{O}_X$-modules that are not quasi-coherent sheaves

algebraic-geometry big-list

Is the axiom of choice necessary to prove that closed points in the Zariski topology are maximal ideals?

algebraic-geometry ideals axiom-of-choice affine-schemes zariski-topology

Applications of Belyi's theorem

algebraic-geometry algebraic-curves riemann-surfaces

Comparison of saturated ideals and radical ideals

algebraic-geometry

Irreducible closed subsets of a scheme corresponds to points

algebraic-geometry commutative-algebra schemes

Is simply connectedness preserved after deleting a high codimension set

algebraic-geometry algebraic-topology fundamental-groups

A mistake in Grothendieck's Tôhoku paper? Theorem 5.2.1

algebraic-geometry sheaf-cohomology spectral-sequences equivariant-cohomology