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Aug
16
answered Quotient of locally free sheaf is locally free?
Aug
15
answered Scheme theoretic dual of $\mathbb P^n_k$
Aug
12
answered Morphism schemes after base extension
Aug
11
answered is tangent bundle of $S^n$ an algebraic variety?
Aug
10
answered “Nice proof” that the unit of the left Kan extension of $F$ is an isomorphism, if $F$ is fully faithful
Aug
6
answered A non-algebraic complete lattice
Aug
6
answered Can a ring be both commutative and anticommutative?
Aug
3
answered Hypercohomology: finding a resolution for the de Rham complex of $\mathbb{CP}^1 $
Aug
2
answered Two questions on the definition of $\mathcal{O}_X(U)$ for an affine scheme $X$.
Aug
2
answered Adjunction counit for sheaves is isomorphism
Aug
1
answered Natural Transformations Without Objects
Aug
1
answered What are differences between affine space and vector space?
Jul
29
answered Is there a discrete initial topology on the set of real numbers?
Jul
28
answered Simplicial homology of the skeleton of a simplex
Jul
27
answered Universal property of polynomial ring in $\mathbf{CRING}$
Jul
23
answered How do we get a simplicial homology functor?
Jul
23
asked What are local homomorphisms, geometrically?
Jul
22
answered When are two morphisms of sheaves the same?
Jul
22
answered Asterisk Notation
Jul
17
answered Is it possible to find square root using only rational numbers and elementary arithmetic operators