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 1d comment Expectation of a discrete random variable Is it enough that $E[X+Y] = E[X] + E[Y]$, regardless of (condition) what is known? Aug 18 accepted Expectation of a discrete random variable Aug 18 revised Expectation of a discrete random variable deleted 1 character in body Aug 18 asked Expectation of a discrete random variable Aug 18 accepted How to find marginal densities from joint density $f(x,y)$? Aug 17 asked How to find marginal densities from joint density $f(x,y)$? May 2 accepted Is there an algorithm for parametrization of equations? Apr 29 asked Is there an algorithm for parametrization of equations? Dec 19 awarded Caucus Nov 12 comment Is there a simpler proof that $f(x,y,z) = 4x + 11y + 18z$ is surjective? ideals are weeks away but thanks for the approach from that perspective :) Nov 12 accepted Is there a simpler proof that $f(x,y,z) = 4x + 11y + 18z$ is surjective? Nov 12 revised Is there a simpler proof that $f(x,y,z) = 4x + 11y + 18z$ is surjective? deleted 1 character in body Nov 12 asked Is there a simpler proof that $f(x,y,z) = 4x + 11y + 18z$ is surjective? Sep 24 awarded Autobiographer Jul 2 awarded Curious Dec 3 awarded Tumbleweed May 27 comment Are there practical applications to the new prime pair proof? I guess the question is pretty obvious, the person who asked it did a quick misinterpretation and one can definitely edit the question to its right form. It is definitely interesting as it touches the Goldbach conjecture and, I guess, Riemann hypothesis. May 27 comment Are there practical applications to the new prime pair proof? Impact on cryptography or any other application? It is obvious that difference between two primes can be arbitrarily large(example, take 2 and the largest discovered prime), I don't think this answers the question. May 19 revised What is $\int x^re^xdx$? what is r? May 19 suggested approved edit on What is $\int x^re^xdx$?