Could you elaborate on this? LC
On Sunday, March 21, 2021 at 10:56:11 AM UTC-5 Bruno Marchal wrote: > 1, 3, 14, 173, 16951, ... > > > Computable or not computable? > > I would conjecture that it is not computable. > > It is the number of way to ‘configure’ circles (in the affine plane) > > It gives pretty pictures. > > Explanation by Neil Sloane: > > https://youtu.be/bRIL9kMJJSc > > Note that the predicate “computable”, (on the incites I of the phi_i) is > itself an exemple of well defined but (highly) non computable number > property, as I have shown many times. > It is pi_2 complete. Riemann hypothesis is pi_1. > > Bruno > -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/everything-list/de0c9d85-d467-48e6-aadd-5c9bc09eba54n%40googlegroups.com.
