Wikipedia:Reference desk/Archives/Mathematics/2014 February 21

= February 21 =

Tweet-length proof of Erdős discrepancy problem
Proof of Erdős discrepancy problem in 140 characters:

k=C+1, d=0, abs(k*x[0]) = C+1 which is > C.

There, saved you a 13 GB download. Hcobb (talk) 22:24, 21 February 2014 (UTC)


 * Cute, but the sum starts at i=1, not i=0, so x0 is undefined. --Mark viking (talk) 22:32, 21 February 2014 (UTC)