[math-fun] A remarkable probability distribution on the (perimeter of the) unit circle

However, when |k|=1 we (unlike plain uniform) do NOT get zero, we get 0.8281 approximately (and of course when k=0 we get 1).

--correction of bug: 0.4529 approximately. (Perhaps somebody can compute this to much greater precision... incidentally it turns out the sum of 1/p^2 for p prime has allegedly been computed to very high precision by Pascal Sebah & Xavier Gourdon: 0.452247420041065498506543364832247934173231343239892421736418... http://numbers.computation.free.fr/Constants/Miscellaneous/constantsNumTheor... http://numbers.computation.free.fr/Constants/Miscellaneous/constantsNumTheor... )