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seen Oct 16 '12 at 20:24

May
7
accepted Family of curves (in algebraic geometry)
May
7
comment Family of curves (in algebraic geometry)
I never studied these things and it seems a little overwhelming to me... :p But thanks for the explanation.
May
7
comment Family of curves (in algebraic geometry)
Does it ever come into play the fact that the curve is singular at $t=0$ and at $t=1$?
May
7
comment Family of curves (in algebraic geometry)
Thanks. What is the difference between considering the family as a variety over $k$ and as a curve over $k(t)$?
May
7
comment Family of curves (in algebraic geometry)
Thanks! But what do you mean by "fix it"?
May
7
asked Family of curves (in algebraic geometry)
Apr
30
comment When is a module over $R$ and $S$ an $R \otimes S$-module?
The reason why I chose this answer instead of the one by Yuan is because, in my opinion, this one is clearer than his one since it doesn't free product.
Apr
27
accepted When is a module over $R$ and $S$ an $R \otimes S$-module?
Apr
27
comment When is a module over $R$ and $S$ an $R \otimes S$-module?
Yes, I corrected the commutativity thing. The example was flawed (not anymore) but the general fact I stated first is still true...
Apr
27
revised When is a module over $R$ and $S$ an $R \otimes S$-module?
added 73 characters in body
Apr
27
revised When is a module over $R$ and $S$ an $R \otimes S$-module?
added 1 characters in body
Apr
27
answered When is a module over $R$ and $S$ an $R \otimes S$-module?
Apr
25
awarded  Commentator
Apr
25
revised When is a module over $R$ and $S$ an $R \otimes S$-module?
added 294 characters in body
Apr
25
comment When is a module over $R$ and $S$ an $R \otimes S$-module?
@Norbert: This might be silly but how do I check this is well-defined?
Apr
25
asked When is a module over $R$ and $S$ an $R \otimes S$-module?
Apr
25
awarded  Supporter
Apr
25
accepted Jacobian of a curve
Apr
25
comment Jacobian of a curve
Thanks! I will check Milne's notes.
Apr
25
comment Jacobian of a curve
Are you saying it also holds in characteristic $p$ (but you don't know where to find the proof)?