New posts in Sheaf Theory

Importance of Vanishing Cohomology

Is the sheafication of a "presheaf of $\mathcal{O}_X$-modules" an $\mathcal{O}_X$-module?

How should we think about the sections of a sheaf on a scheme as functions?

Grothendieck Topos

Why is the structure sheaf (sheaf of rings) $\mathcal{O}$ on $\mathrm{Spec}\ A$ a sheaf?

Why is the ideal sheaf $\mathcal{I}_Y$ equal to $\mathcal{O}(-Y)$ and not $\mathcal{O}(Y)$?

example of a presheaf

Definition of Affine Grassmannian

Homotopy-invariance of sheaf cohomology for locally constant sheaves

Extension by zero not Quasi-coherent.