Ron Ford
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 Mar22 revised How to factor quadratics $(x^2 + 4x + (-357) = 0)$ added dollar signs Mar22 suggested approved edit on How to factor quadratics $(x^2 + 4x + (-357) = 0)$ Mar5 answered Sum of two independent binomial variables Feb16 revised Determining a confidence interval for $\sigma$ from a Rayleigh distribution added clarification Dec11 awarded Caucus Sep30 awarded Explainer Jun1 reviewed No Action Needed Doubt in Calculus Limit Problem Jun1 reviewed No Action Needed How to work out the formula that connects several numbers May30 reviewed No Action Needed Can a polygon have four 90 degree corners and still not be a rectangle? May26 answered How to prove that for any $n$ in $\mathbb{N}$ that $(\frac{3}{2})^n \ge n$? May12 awarded Yearling May10 accepted $N_Q(R)=N_Q(Q\cap R)$ where $Q, R \le P$, $Q$ normal and $P$ a $p$-group May10 comment $N_Q(R)=N_Q(Q\cap R)$ where $Q, R \le P$, $Q$ normal and $P$ a $p$-group I don't see how $R$ would necessarily be normal if $N_Q(R)=Q$. Why can there not exists $x\in P\setminus Q$ such that $xRx^{-1} \neq R$? May10 asked $N_Q(R)=N_Q(Q\cap R)$ where $Q, R \le P$, $Q$ normal and $P$ a $p$-group May9 revised Prove that a counterexample exists without knowing one added dollar signs May9 suggested approved edit on Prove that a counterexample exists without knowing one May8 reviewed No Action Needed Ellipse in polar coordinates May8 reviewed No Action Needed Check if the number is a result of multiplying two fibonacci numbers May4 reviewed No Action Needed Vector Space-Linear Transformation (Multiple Choice) May2 suggested rejected edit on Representing four-dimensional pyramids