AlanH
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 Dec1 accepted How to find the maximum and minimum of $\dfrac{\sin x}{x^2+1}$? Nov11 accepted How to show $a_n = \frac{n+1}{n-1}$ is strictly decreasing by induction? Jun26 accepted Showing path connected matrices of a group $G$ is a normal subgroup Jun19 accepted Understanding equivalent definitions of left cosets Jun18 accepted Open sets in $\Bbb{R}^2$ and $\Bbb{R}^3$ Jun17 accepted Clarification on quotient groups Jun17 accepted Congruence relation possible typo? Jun10 accepted Clarification needed on finding last two digits of $9^{9^9}$ Jun10 accepted Showing a compact metric space has a countable dense subset Jun10 accepted Can a group of order $55$ have exactly $20$ elements of order $11$? (Clarification) Jun8 accepted Determining whether or not a group has an element of a specific order Jun8 accepted What can we say about the order of a group given the order of two elements? Jun2 accepted Find all positive integers $x$ such that $13 \mid (x^2 + 1)$ Jun2 accepted Showing existence of an element with order $p$ May27 accepted Proving $\sum_{m=0}^M \binom{m+k}{k} = \binom{k+M+1}{k+1}$ May26 accepted Finding the values of $z$ s.t. $\sum_{n=0}^{\infty} \left( \frac{z}{1+z} \right)^n$ is convergent May19 accepted Definition of open set/metric space May15 accepted Finding asymptotes to general functions May14 accepted Infinitely many primes of the form $4n+3$ May12 accepted Using $\gcd(a,b)$ to find gcd of other values $\gcd(a^2,b)$ and $\gcd(a^3,b)$