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 Aug 15 awarded Popular Question Feb 21 awarded Yearling Dec 21 revised Show that $\left| \mathbb{P}(X=m)-\mathbb{P}(Y=m) \right| \le \mathbb{P}(Y\ne X)$ edited the title and the probability notation Dec 21 suggested approved edit on Show that $\left| \mathbb{P}(X=m)-\mathbb{P}(Y=m) \right| \le \mathbb{P}(Y\ne X)$ Dec 20 revised Does $\theta(n)$ = $1/x$ make any sense? edited the notation Dec 20 suggested approved edit on Does $\theta(n)$ = $1/x$ make any sense? Dec 20 awarded Constituent Dec 15 awarded Caucus Oct 2 revised How to prove the eigenvalues of tridiagonal matrix? corrected spelling Oct 2 suggested approved edit on How to prove the eigenvalues of tridiagonal matrix? Sep 30 awarded Explainer Jul 2 awarded Curious Feb 21 awarded Yearling Dec 30 comment Evaluate $\sum_{n=1}^{\infty} \frac{\ln n}{(n+1)!}$ You may use Stirling's approximation. Dec 28 asked Sources on Inverse Spectral Theory Dec 6 comment Sufficient statistic for uniform distribution Check the Fisher–Neyman factorization theorem. Nov 19 revised Show $f(x) = (x^4+x^2+1)/(x^3+1)$ is $O(x)$ added 1 characters in body Nov 19 revised Show $f(x) = (x^4+x^2+1)/(x^3+1)$ is $O(x)$ deleted 1 characters in body Nov 18 revised Show $f(x) = (x^4+x^2+1)/(x^3+1)$ is $O(x)$ added 50 characters in body Nov 18 answered Show $f(x) = (x^4+x^2+1)/(x^3+1)$ is $O(x)$