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May
4
revised Does $0$ correlation imply independence for marginally normal distributions?
rolled back to a previous revision
May
4
reviewed Close How do we get $S(m) = S(m/2) + \lg m$ from $T(n) = T(\sqrt{n}) + \lg\lg n$?
May
4
reviewed Leave Open Local informatics Olympiad and Algorithm
May
4
reviewed Close All entire functions which satisfying : $f(2z)=f(z)^{2}$
May
4
reviewed Close Compute $\frac{1}{e}\sum\limits_{n=0}^{\infty}\frac{n^{k}}{n!}$ for $k=0, 1, 2 … $
May
4
reviewed Leave Open How to find this integral from Gaussian integral?
May
4
reviewed Close Find all functions $f: \mathbb{Z} \to \mathbb{Z} $ such that for all $x,y, \in \mathbb{Z}$, $f(x-y+f(y))=f(x)+f(y)$.
May
4
reviewed Close An isometry of Hilbert spaces using the Radon-Nikodym derivative
May
4
reviewed Close Linear Regression and finding Correlation Coefficient
Apr
24
reviewed Leave Open Covering relation over functions
Apr
24
reviewed Leave Open Complex Number to a power
Apr
24
reviewed Leave Open Surgery to unlink $S^1$ and $S^2$ in $S^4$
Apr
24
reviewed Close What radius circle to remove from unit circle to make golden earring?
Apr
24
reviewed Close Proving $\lim_{x\to 0}f(x)=\infty$.
Apr
24
reviewed Close Define $(a_n)_{n\in \mathbb{N}}$ by $a_n:=\prod_{k=2}^n (1-\frac{1}{k^{1+c}})$. Does $\lim_{n\to\infty} a_n=0$ hold?
Apr
24
reviewed Approve Find the values of a and b such that the sytem has a unique solution and a two-parameter solution?
Apr
16
reviewed Leave Closed Is $ (A × B) ∪ (C × D) = (A ∪ C) × (B ∪ D)$ true for all sets $A, B, C$ and $D$?
Apr
16
reviewed Leave Open Proof that any unit-speed-reparametrization of a curve preserves orientation and is an inverse of an arc length function based at some $t_0$.
Apr
16
reviewed Leave Open Product of two infinite sequences
Apr
16
reviewed Close How to solve $1 = \sum_{p \text{ prime}} x^{-p-1}$?