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seen Jan 17 '13 at 21:52

Jan
3
awarded  Supporter
Jan
3
comment Difference between fields $\mathbb{Q}[\sqrt{2}+\sqrt{3}]$ and $\mathbb{Q}[\sqrt{2},\sqrt{3}]$?
Awesome, this makes it much clearer now!
Jan
3
revised Difference between fields $\mathbb{Q}[\sqrt{2}+\sqrt{3}]$ and $\mathbb{Q}[\sqrt{2},\sqrt{3}]$?
added 521 characters in body
Jan
3
awarded  Editor
Jan
3
revised Difference between fields $\mathbb{Q}[\sqrt{2}+\sqrt{3}]$ and $\mathbb{Q}[\sqrt{2},\sqrt{3}]$?
added 521 characters in body
Jan
3
comment Difference between fields $\mathbb{Q}[\sqrt{2}+\sqrt{3}]$ and $\mathbb{Q}[\sqrt{2},\sqrt{3}]$?
Thanks, I see where $sqrt{6}$ comes from then, just I am unsure on what the actual definition of Q[a+b] and Q[a,b] then is.
Jan
3
asked Difference between fields $\mathbb{Q}[\sqrt{2}+\sqrt{3}]$ and $\mathbb{Q}[\sqrt{2},\sqrt{3}]$?
Dec
5
comment Proving that crossing number for a graph is the lowest possible
I do not think that there is an easy solution. Idea about the forbidden subgraph is a good one, you just gave me inspiration if I could show that that one still has a K3,3 subgraph(K5 is not happening) no matter what edge is removed would be one way.
Dec
2
answered Existence of a self-complementary graph
Dec
2
awarded  Student
Dec
2
asked Proving that crossing number for a graph is the lowest possible