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visits member for 2 years, 9 months
seen Feb 7 '13 at 18:18

Nov
3
awarded  Popular Question
Jul
11
awarded  Nice Question
Jul
2
awarded  Curious
Jul
2
awarded  Inquisitive
Mar
16
awarded  Yearling
Mar
16
awarded  Yearling
Feb
3
asked What are the easiest surfaces of general type
Feb
3
comment An example of decomposing a projective variety
Have you tried showing your variety is irreducible? You could use the "dictionary" between closed subsets of projective $n$-space and ideals of k[a_0,\ldots,a_n]$. Being irreducible as a closed subset usually boils down to the polynomials being irreducible.
Feb
3
suggested rejected edit on Definition of tamely ramified
Feb
2
comment Is the number of automorphisms of a hyperelliptic curve bounded
The curve $y^2=x^{2g+1}+1$ admits the automorphism $(x,y)\mapsto (\zeta_{2g+1}^n x, y)$ for all $n=1,\ldots,2g+1$. Thus, the number of automorphisms of this hyperelliptic curve is at least $2g+1$. Is this correct?
Jan
31
asked Is the number of automorphisms of a hyperelliptic curve bounded
Jan
31
accepted Elliptic curves over Spec Z
Jan
30
revised Elliptic curves over Spec Z
added 77 characters in body
Jan
30
asked What do we know about smooth families over the open unit disc
Jan
29
comment Elliptic curves over Spec Z
I wanted to be sure myself, but let $E$ be an elliptic curve over $\mathbf Q$ with good reduction over $\mathbf Z$. Then its minimal regular model coincides with its minimal Weierstrass model.
Jan
29
asked Elliptic curves over Spec Z
Jan
25
revised Doesn't Abhyankar's lemma contradict faithful flat descent (no, but I'm confused)
added 63 characters in body
Jan
25
accepted Doesn't Abhyankar's lemma contradict faithful flat descent (no, but I'm confused)
Jan
25
revised Doesn't Abhyankar's lemma contradict faithful flat descent (no, but I'm confused)
deleted 134 characters in body
Jan
25
comment Doesn't Abhyankar's lemma contradict faithful flat descent (no, but I'm confused)
Yes, I just wanted to be sure. Thank you for this. It completely cleared up everything.