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# 19 Actions

 Sep 24 awarded Autobiographer Jun 7 awarded Notable Question Oct 2 awarded Popular Question Oct 28 awarded Excavator Oct 28 revised Construct a bijection from $\mathbb{R}$ to $\mathbb{R}\setminus S$, where $S$ is countable formatting Oct 28 suggested approved edit on Construct a bijection from $\mathbb{R}$ to $\mathbb{R}\setminus S$, where $S$ is countable Sep 19 comment Compute $\sum_{k=0}^{\infty} \frac{3}{(3 k)!}$ Oh my god, I see it now. Sep 19 comment Compute $\sum_{k=0}^{\infty} \frac{3}{(3 k)!}$ but... but... $3/3k=1/k$ Jul 27 awarded Editor Jul 27 revised Is this statement stronger than the Collatz conjecture? answerers are misunderstanding my question Jul 27 comment Is this statement stronger than the Collatz conjecture? I see from a false statement everything is implied, but I think in this exact situation we needn't investigate the truthness of $S$. Jul 27 awarded Student Jul 27 asked Is this statement stronger than the Collatz conjecture? Apr 13 comment Getting the sequence $\{1, 0, -1, 0, 1, 0, -1, 0, \ldots\}$ without trig? This is so brutally simple I never ever were able to find it. Mar 15 awarded Teacher Mar 15 answered Casio fx-82MS: n-th logarithm Mar 15 comment Casio fx-82MS: n-th logarithm @Nunoxic, wow, is it possible? I'll search this function. David Mitra, your solution is great for me. Mar 15 awarded Supporter Mar 15 asked Casio fx-82MS: n-th logarithm