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Sep
9
comment Origin of Littlewood's idea about sign changes of $Li(x) - \pi(x)$
@DanielFischer: This is how I interpret Chebyshev's idea, and so then I think it doesn't deal with sign changes at all, strictly speaking?
Sep
9
asked Origin of Littlewood's idea about sign changes of $Li(x) - \pi(x)$
Sep
8
accepted Calculation involving $\int_2^x \frac{dx}{\log x}$
Sep
7
revised Calculation involving $\int_2^x \frac{dx}{\log x}$
added 686 characters in body
Sep
7
revised Calculation involving $\int_2^x \frac{dx}{\log x}$
added 267 characters in body
Sep
7
revised Calculation involving $\int_2^x \frac{dx}{\log x}$
added info
Sep
7
revised Calculation involving $\int_2^x \frac{dx}{\log x}$
added 71 characters in body
Sep
7
revised Calculation involving $\int_2^x \frac{dx}{\log x}$
added 79 characters in body
Sep
7
revised Calculation involving $\int_2^x \frac{dx}{\log x}$
added 5 characters in body
Sep
7
awarded  Custodian
Sep
7
reviewed Reject Calculation involving $\int_2^x \frac{dx}{\log x}$
Sep
7
asked Calculation involving $\int_2^x \frac{dx}{\log x}$
Sep
3
comment Why are prime numbers important in real life?
Cryptography is the only "practical use" that comes to mind.
Aug
24
revised What are better words to use in an article than “obvious”?
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Aug
24
answered What are better words to use in an article than “obvious”?
Aug
23
awarded  Informed
Aug
22
comment Proving $\frac{1}{n^2}$ infinite series converges without integral test
Do you happen to have a source for this? I'd like to see others like this if there is some central repository...
Aug
22
comment For squarefree $i$ what is $\sum_1^{n} \frac{1}{i}$?
@marty cohen: Wouldn't the sum in the post be less than $\sum 1/n$? I think $\sum_{p\leq x}1/p < \sum_{i\leq x} 1/i < \sum_{n \leq x} 1/n $ but maybe I haven't had enough coffee. Your suggestion implies the sum is larger?
Aug
22
awarded  Fanatic
Aug
20
revised Could someone explain this animated gif to me in mathematical terms?
added 888 characters in body