Grigory M
Reputation
11,475
358/400 score
 Aug 26 awarded Nice Question Aug 25 reviewed Close Odd prime combinatorics problem Aug 25 reviewed Close Trivial Graph theory questions Aug 23 reviewed No Action Needed Show that $\cos^n{\theta}\leq\cos{n\theta},\theta\in[0,\frac{\pi}{2}],n\in]0,1[$. Aug 23 comment Is the functional equation for $\zeta (s) \left(1-\frac{1}{3^{s-1}}\right)$ known? Yes, just change $2^{-s}$ to $3^{-s}$ (and $2^{-s-1}$ to $3^{-s-1}$) in the func. equations for $\eta$. Aug 21 comment The form of the zeta function of an elliptic curve over a finite field And of course a proof for $y^2=x^3-x$ goes back to Gauss (see e.g. Ireland, Rosen. A Classical Introduction to Modern Number Theory, ch. 8 for the proof) Aug 21 comment The form of the zeta function of an elliptic curve over a finite field Well, there is a relatively elementary proof in Silverman. The Arithmetic of Elliptic Curves Aug 21 reviewed No Action Needed The form of the zeta function of an elliptic curve over a finite field Aug 21 reviewed Reject Dirichlet's Divisor Problem Aug 21 reviewed Reject Graph Path Length Problem Aug 21 reviewed Reject Existence of a $\theta$ - Taylor Expansion Problem Aug 21 reviewed Looks OK Proving that $\sin x > \frac{(\pi^{2}-x^{2})x}{\pi^{2}+x^{2}}$ Aug 21 reviewed Reject How do I count the subsets of a set whose number of elements is divisible by 3? 4? Aug 18 reviewed Close How to show $\int_{0}^{\infty}e^{-x}x^{-1} dx = \infty$ Aug 16 reviewed Looks OK Help finding the limit of this series $\frac{1}{4} + \frac{1}{8} + \frac{1}{16} + \frac{1}{32} + \cdots$ Aug 15 reviewed Looks OK Does square difference prove that 1 = 2? Aug 15 reviewed No Action Needed Why do we need to check for more than $\frac{\infty}{\infty}$ or $\frac{0}{0}$ when applying L'Hospital? Aug 15 reviewed Reviewed Separating family of functions for measures Aug 14 reviewed No Action Needed How do I integrate (1/polynomial) without using partial fractions? Aug 14 reviewed No Action Needed Extension of Pontryagin's principle