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Mar
11
suggested approved edit on if $p \mid (a^2 + b^2 )$, $p \nmid a$ and $p \nmid b$. Prove that there exists an integer $c$ such that $c^2 \equiv −1 \mod p$.
Mar
4
suggested approved edit on Find all solutions to $x^{10} = 1 \pmod {377}$
Mar
2
suggested approved edit on Prove that there is an increasing sequence $\{a_n\}$ of points in $A$ such that $\lim a_n = \sup A$.
Feb
14
suggested rejected edit on Schwarz Inequality?
Jan
29
suggested approved edit on Find $\lim_{x\to \infty}{[({1\over e}(1+{1\over x})^x)]^x}$.
Nov
17
suggested approved edit on Can product of two singular matrices be invertible?
Sep
25
suggested approved edit on Prove that $E[Y_1 + Y_2\mid X=x] $…
Apr
2
suggested approved edit on Statistics and Probability, finding unbiased estimates of mean and variance given sigma x and sigma (x^2)
Aug
30
suggested approved edit on Prove that the CDF of a random variable is always right-continuous
Aug
30
suggested approved edit on is $\{(x,y) : x,y \in \mathbb{Z} \}$ a closed set?
Aug
25
suggested approved edit on solving equations by the method of elimination
Aug
20
suggested rejected edit on Ratio problem to find the woman weekly salary
Aug
4
suggested approved edit on show that $\int_{0}^{\infty} \frac {\sin^3(x)}{x^3}dx=\frac{3\pi}{8}$
Jul
29
suggested approved edit on Show if $\|\cdot\|$ is a norm then $\|f(\cdot)\|$ is a norm where $f$ is linear and invertible
Jul
22
suggested approved edit on Prove that $\gcd(x, y)=\gcd(x,ax+y)$, would this be the correct reasoning?
Jul
13
suggested approved edit on $F(u)= \frac{2}{\pi}\int_{0}^\infty \frac{uf(x)}{u^2 + x^2}dx.$ Show that $\lim\limits_{u\downarrow0}F(u)=f(0)$.
Feb
2
suggested rejected edit on Positive definite matrix inequality
Dec
4
suggested approved edit on Minimum of variance
Nov
25
suggested approved edit on To show that $P(|X-Y| \leq 2) \leq 3P(|X-Y| \leq 1)$
May
28
suggested rejected edit on How to evaluate $\int\limits^1_0 \sqrt{1+\frac{1}{x}}\, \text{d}x$