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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 Apr10 answered Does Greens Theorem apply to the annulus? Apr10 comment Rigorously prove $\mathbb{Q}(\sqrt2,\sqrt3) = \mathbb{Q}(\sqrt2) (\sqrt3)$ Can you show that one of these fields is contained in the other? Apr10 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. Apr10 revised Applying Chain rule to $z = z(u, v) = f(x(u, v), y(u, v))$. tex Apr10 answered A clique in a tree decomposition is contained in a bag Apr10 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? Apr10 awarded Curious Apr9 asked number of roots of unity which satisfy a given polynomial Apr9 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 $[\mathcal{O}_L:\mathcal{O}_K][\mathcal{O}_K:\mathbb{Z}]=[\mathcal{O}_L:\mathbb{‌​Z}]$. Apr9 revised Number rings as free module over base ring typo Apr9 answered Number rings as free module over base ring Apr8 comment Find a ring homomorphism $\tau: \mathbb{F} \rightarrow \mathbb{F}$ How are the multiplication and addition defined in the ring $\mathbb{F}$? Mar6 awarded Nice Answer Jan31 reviewed Approve Given a list of integers between $0$ and $99$, create a function that will fit all the integers in the list. Jan28 answered Semisimple module example Jan27 comment The Galois correspondence on finite extensions You should start by reading planetmath.org/infinitegaloistheory Jan27 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? Jan26 revised Two question about ${\mathbb Q}(\alpha)$ for $\alpha$ := $\sqrt[n]{7}$ + $\sqrt[n+3]{7}$ added 29 characters in body