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Apr
15
answered Show that a variety is irreducible
Apr
13
answered Residue class field of coordinate ring
Mar
16
answered Looking for a proof that the resultant is the product of the differences of roots
Mar
12
answered $\mathbb{G}_a$ or $\mathbb{G}_m$ as subgroups of Affine Algebraic Groups
Mar
12
answered Prove that for each $p \in Y$ the quotient field of $O_p$ is isomorphic to the field $K(Y)$.
Mar
10
answered The 2 Charts of “Blowing up the Origin in $\mathbb{C}^2$ ”
Mar
7
answered why are projective spaces and varieties prefferable?
Mar
7
answered True or False: $f$ is injective if and only if $f^*$ is surjective where $f^*$ is corresponding to the pullback to $f$.
Mar
4
answered Isomorphism between End$(V)\otimes A$ and End$_A(V\otimes A)$.
Mar
3
asked Can a birational morphism surject from an affine to a projective variety?
Mar
3
asked Resolution of singularities of the determinant hypersurface
Mar
1
answered Orbits of algebraic groups (dimension of connected components)
Feb
19
answered Covers with fixed ramification
Feb
16
answered Which rational functions $\mathbb{P}^1\rightarrow k$ are regular at the point at infinity?
Feb
9
answered How many non-increasing sequences are there over the natural numbers?
Feb
8
answered Describe invariants using coaction.
Jan
28
answered How to show that a polynomial maps an algebraic set to an algebraic set?
Jan
23
answered the top chern class of the holomorphic tangent bundle is the euler class
Jan
22
answered Let $f: U \rightarrow W$ be a morphism of affine algebraic sets and $f': k[W] \rightarrow k[U]$ be the k-algebra morphism of coordinate rings.
Jan
5
answered If $xa=xb$ then $a=b$