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comment Blow-up toric varieties.
Cox has also written a rather short and easy-read article (much shorter than the book). It can be found on his web page: www3.amherst.edu/~dacox
Apr
14
answered How can I verify that the ideal $(x^2-zw, z^2-yw, y^3-xw, w^3-xy^2z)$ in $\mathbb Q[x,y,z,w]$
Mar
28
answered Lines on a singular cubic surface
Mar
28
comment Definition of a smooth complete integral pointed algebraic curve
This sounds like material you can read from Hartshorne's book.
Mar
27
comment Succesive vs simultaneous blow-up
This is not a particularly helpful answer. Can you give some reasons why your answer is true?
Mar
25
comment If $\phi :G\rightarrow H$ is a group homomorphism and $G$ is soluble, then $Im(\phi)$ is also soluble
@AndrewBrick Try applying $\phi$ to each part of the series.
Mar
24
answered If $\phi :G\rightarrow H$ is a group homomorphism and $G$ is soluble, then $Im(\phi)$ is also soluble
Mar
20
revised Suppose nine distinct points in $\mathbb P^2(\Bbb C )$ do not all lie on any one line and any line through two of them passes through a third. Show…
added 1 character in body; edited title
Mar
8
comment What is $I(\{(0,0)\})$?
@Leafar No, $\langle x,y\rangle$ is equal to all polynomial combinations of $x$ and $y$.
Mar
8
comment In a PID , show that a maximal ideal is a prime ideal and conversely.
What is the question?
Mar
7
revised Non-isomorphic $\mathbb{C}$-algebras
added 11 characters in body
Mar
6
comment How to show that the intersection of all neighbourhood of $0$ in a topological group is a subgroup?
I asked this question before. See here: math.stackexchange.com/questions/13368/…
Mar
6
answered Computing the ideal of a finite set of points
Mar
5
comment Finding a specific module.
@user26857 Just to be sure! This is the way one shows that the rank of free modules over a commutative ring is well-defined anyways.
Mar
5
answered Finding a specific module.
Mar
4
comment Describe the differential of $d\phi : \mathbb{T}_{t, \mathbb{A^1}} \rightarrow \mathbb{T}_{t^3, t^4, t^5, W}$
@George Try Shafarevich.'
Mar
3
answered Line Bundles on Local Rings
Mar
2
answered scheme of finite type - geometric interpretation
Mar
1
answered From a family of projective curves to a surface
Feb
28
comment Identifying the tensor product of two given modules over $\mathbb Z/2\mathbb Z$.
Over what ring is the tensor product taken?