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 Curious
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4h
answered Show that $B^{(1)} = 0$ and $B^{(2)}$ have basis $\{[x_i,x_j]; i>j\}$
5h
revised Maximal ideals and prime ideals of $\mathbb{Z}/2 \times \mathbb{Z}/2$?
tex
Apr
10
answered Does Greens Theorem apply to the annulus?
Apr
10
comment Rigorously prove $\mathbb{Q}(\sqrt2,\sqrt3) = \mathbb{Q}(\sqrt2) (\sqrt3)$
Can you show that one of these fields is contained in the other?
Apr
10
comment Applying Chain rule to $z = z(u, v) = f(x(u, v), y(u, v))$.
You should give a better title to your question, than just its first sentence.
Apr
10
revised Applying Chain rule to $z = z(u, v) = f(x(u, v), y(u, v))$.
tex
Apr
10
answered A clique in a tree decomposition is contained in a bag
Apr
10
comment number of roots of unity which satisfy a given polynomial
This is a nice approach. The problem is that $u(t),v(t)$ are not polynomials. If on the other hand we multiply by $(1+t^2)^{\deg(f)}$, then they become polynomials but with degree $2\deg(f)$. Is there a way to bound $\deg(gcd(u,v))$ in this case?
Apr
10
awarded  Curious
Apr
9
asked number of roots of unity which satisfy a given polynomial
Apr
9
comment Number rings as free module over base ring
@Asvin : You are right, it should be $\mathcal{O}_L$ - fixed it. In case it is free, its rank is $[L:K]$. You can see this by noting that $[\mathcal{O}_L:\mathcal{O}_K][\mathcal{O}_K:\mathbb{Z}]=[\mathcal{O}_L:\mathbb{‌​Z}]$.
Apr
9
revised Number rings as free module over base ring
typo
Apr
9
answered Number rings as free module over base ring
Apr
8
comment Find a ring homomorphism $\tau: \mathbb{F} \rightarrow \mathbb{F}$
How are the multiplication and addition defined in the ring $\mathbb{F}$?
Mar
6
awarded  Nice Answer
Jan
31
reviewed Approve Given a list of integers between $0$ and $99$, create a function that will fit all the integers in the list.
Jan
28
answered Semisimple module example
Jan
27
comment The Galois correspondence on finite extensions
You should start by reading planetmath.org/infinitegaloistheory
Jan
27
comment Group $G$ s.t. $x^5y^3=x^8y^5=e$
what have you tried so far? did you try to find other relations on x,y?
Jan
26
revised Two question about ${\mathbb Q}(\alpha)$ for $\alpha$ := $\sqrt[n]{7}$ + $\sqrt[n+3]{7}$
added 29 characters in body