Wikipedia:Reference desk/Archives/Mathematics/2012 July 14

= July 14 =

pessimistic tit-for-two-tats
Is a noncooperative solution to a pessimistic tit-for-two-tats situation, a preemptive second strike? — Preceding unsigned comment added by 80.99.254.208 (talk) 07:39, 14 July 2012 (UTC)
 * That sentence is grammatically ambiguous -- it looks like it has the same form as "Is a bird a hawk?". Could you try to ask it in a different way, please? Looie496 (talk) 18:16, 14 July 2012 (UTC)

Concerning Ramsey Numbers
I am interested in knowing the best known general upper and lower bounds (non-asymptotic) for an arbitrary Ramsey number R(k,l).(with appropriate references) Similarly the best known general upper and lower bounds for an arbitrary diagonal Ramsey number R(k,k). The page on Ramsey's theorem only gives the best known bounds for the diagonal numbers and that too are asymptotic. I am more interested in non-asymptotic bounds. Can someone help please?-Shahab (talk) 11:59, 14 July 2012 (UTC)

Are circles fractals?
Are circle fractals? — Preceding unsigned comment added by 96.244.133.153 (talk) 16:09, 14 July 2012 (UTC)
 * No. A fractal has a fractal dimension that is different from its topological dimension.  For a circle, both dimensions are equal to 1. Looie496 (talk) 18:10, 14 July 2012 (UTC)
 * Thanks — Preceding unsigned comment added by 96.244.133.153 (talk) 20:27, 14 July 2012 (UTC)

-- Gilderien Chat&#124;List of good deeds 20:55, 14 July 2012 (UTC)