Apr13 awarded Good Answer Apr8 comment Roots of Unity: Sums, Products, and Field Extensions @kevin Dear kevin, I added some more detail to my first hint. Apr8 revised Roots of Unity: Sums, Products, and Field Extensions added 346 characters in body Apr8 awarded Popular Question Apr8 answered Roots of Unity: Sums, Products, and Field Extensions Apr4 revised Let $t$ be a transcendental number. Prove that the set $\{(a+bt) \mid a,b \in \mathbb{Q}\}$ is not a number field. edited title Apr4 answered Let $t$ be a transcendental number. Prove that the set $\{(a+bt) \mid a,b \in \mathbb{Q}\}$ is not a number field. Mar22 answered Prove that the Galois group of $x^n-1$ is abelian over the rationals Mar18 comment Calculating the divisors of the coordinate functions on an elliptic curve Dear Alvaro, thank you so much for this very detailed and clearly explained answer. I really appreciate your help. Mar17 comment Calculating the divisors of the coordinate functions on an elliptic curve Dear Alvaro, can you please explain why the function $\dfrac{X-e_1Z}{Z} = \dfrac{Y^2}{(X-e_2Z)(X-e_3Z)}$ has a double pole at $[0,1,0]$? I'm studying from Silverman's book and according to his definitions in page 18, I found a uniformizer at $[0,1,0]$ to be $x= \dfrac{X}{Y}$, but then it is not clear to me how to prove that the above rational function is in the ideal $M_{[0,1,0]}^{-2} = \langle x^{-2} \rangle_{K[E]_{[0,1,0]}}$ Mar4 awarded Popular Question Feb17 comment Equivalent definitions of Hermite polynomials Dear @b00nheT, do you know a reference that someone whose only knowledge of physics amounts to what little he can remember from three General Physics courses taken in college about 8 years ago could understand? (I really hope that there's another way to pass from one definition to the other without having to solve the Schrodinger equation that you mention). Thanks a lot for your comment =) Feb17 asked Equivalent definitions of Hermite polynomials Jan20 revised Convergence of the integral $\int\limits_{1}^{\infty} \left( \frac{1}{\sqrt{x}} - \frac{1}{\sqrt{x+3}} \right) \, dx$ added 28 characters in body; edited tags; edited title Jan17 reviewed Reject suggested edit on A restatement of my question about the totient function and congruence classes Jan15 asked How to determine the group structure of $E(\mathbb{R})$ for an elliptic curve $E/\mathbb{R}$ Jan8 revised How to show that $\Delta\left(\frac{az+b}{cz+d}\right)=(cz+d)^{12}\Delta(z)$? added 29 characters in body Dec31 reviewed Approve suggested edit on How many even numbers are there in a set $\{x_1, x_2 … x_n\}$ Dec30 answered Entire function with $|f(z^{2})|\leq e^{|z|}$ Dec28 reviewed Reject suggested edit on Prove that a linear operator is indecomposable