David
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 Apr13 awarded Popular Question Mar20 revised Prove that function is continuous without knowing the function explicitly Corrected misspelling Mar20 suggested approved edit on Prove that function is continuous without knowing the function explicitly Dec8 awarded Notable Question Dec7 awarded Popular Question Nov15 awarded Popular Question Oct25 awarded Popular Question Sep17 awarded Popular Question Sep16 comment Calculating running time for C code @DavidK I think the average would be $\frac{\sum_{j=1}^{N-1} j}{N-1} \rightarrow \frac{\frac{N(N-1)}{2}}{N-1}\rightarrow \frac{N(N-1)}{2(N-1)} \rightarrow \frac{N}{2}$ Right? Sep16 awarded Yearling Sep16 comment Calculating running time for C code Wait...I still don't get how you got from $\frac{N^2}{2}$ to $\frac{N}{2}$. Sep16 comment Calculating running time for C code Didn't you mean from $2$ to $N-1$ when $i=1$ because $j$ is equal to $i+1$? Sep14 comment Calculating running time for C code How did you figure out that it runs $\frac{1}{2}N` times? Sep10 accepted A summation that starts from$-\infty$Sep10 comment A summation that starts from$-\infty$I get how you simplified to$2^n \sum_{k = 0}^\infty 2^{-k}$, but not how you got$2^{n+1}$from that... Sep10 comment A summation that starts from$-\infty$@LordSoth Why do we need to do that? Sep10 asked A summation that starts from$-\infty\$ Sep10 revised Proving that a definition of e is unique Fixed spelling, used LaTex version of lim. Sep10 suggested approved edit on Proving that a definition of e is unique Sep9 revised Incongruity between summation and proof result edited body