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May
22
revised How do I find the orders of this rational function?
edited body
May
21
answered How do I find the orders of this rational function?
May
16
answered Let $R=\{a/b \in \mathbb{Q} \mid \text{$b$ is odd}\}$
May
7
revised Help with Math software (macaulay 2)
edited tags
May
6
comment What's the difference between the automorphism and isomorphism of graph?
@user2820579 I guess that's one way of looking at it - though I wouldn' think too much of labellings.
May
2
comment Calculating Hodge numbers by means of locally free resolutions
The article you cite is a short version of his PhD thesis. Here's a link to his full thesis, in which he proves this in much more detail. The trick is to use the standard exact sequences relating $\Omega_X$ to $\Omega_{\mathbb P}$ and $\mathbb I/I^2$. folk.uio.no/einarro/Projects/Previous/thesis.pdf
May
2
answered Definition of a fan of a polytope
May
2
answered Singular plane cubic curve birational to $\mathbb{P}^1$
May
1
answered Algorithm to generate an arbitrary matrix of special linear group $SL(2,\mathbb{Z})$
Apr
28
answered Isomorphism between affine varieties
Apr
23
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?