On the sum of the reciprocals of the twin primes and the Brun constant











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I have this question related to the sum of the reciprocals of the twin primes:
how to explain that, for $x ge 3$, we have



$$ pi _{2}(x)=Oleft({frac{x(log log x)^{2}}{(log x)^{2}}}right).$$



Does this imply that the sum is finite? Thank you in advance.



Note that I have not found the paper of Brun.










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    See here: artofproblemsolving.com/wiki/index.php?title=Brun%27s_constant
    – Alex R.
    Aug 11 at 22:34















up vote
0
down vote

favorite
1












I have this question related to the sum of the reciprocals of the twin primes:
how to explain that, for $x ge 3$, we have



$$ pi _{2}(x)=Oleft({frac{x(log log x)^{2}}{(log x)^{2}}}right).$$



Does this imply that the sum is finite? Thank you in advance.



Note that I have not found the paper of Brun.










share|cite|improve this question




















  • 1




    See here: artofproblemsolving.com/wiki/index.php?title=Brun%27s_constant
    – Alex R.
    Aug 11 at 22:34













up vote
0
down vote

favorite
1









up vote
0
down vote

favorite
1






1





I have this question related to the sum of the reciprocals of the twin primes:
how to explain that, for $x ge 3$, we have



$$ pi _{2}(x)=Oleft({frac{x(log log x)^{2}}{(log x)^{2}}}right).$$



Does this imply that the sum is finite? Thank you in advance.



Note that I have not found the paper of Brun.










share|cite|improve this question















I have this question related to the sum of the reciprocals of the twin primes:
how to explain that, for $x ge 3$, we have



$$ pi _{2}(x)=Oleft({frac{x(log log x)^{2}}{(log x)^{2}}}right).$$



Does this imply that the sum is finite? Thank you in advance.



Note that I have not found the paper of Brun.







prime-twins distribution-of-primes






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share|cite|improve this question













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edited Nov 23 at 12:40









amWhy

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asked Aug 11 at 19:59









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1297








  • 1




    See here: artofproblemsolving.com/wiki/index.php?title=Brun%27s_constant
    – Alex R.
    Aug 11 at 22:34














  • 1




    See here: artofproblemsolving.com/wiki/index.php?title=Brun%27s_constant
    – Alex R.
    Aug 11 at 22:34








1




1




See here: artofproblemsolving.com/wiki/index.php?title=Brun%27s_constant
– Alex R.
Aug 11 at 22:34




See here: artofproblemsolving.com/wiki/index.php?title=Brun%27s_constant
– Alex R.
Aug 11 at 22:34















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