Timeline for Is every sequence that looks like an AP really an AP?

7 events

when toggle format	what		by	license	comment
May 1, 2017 at 16:02	vote	accept	Jens Reinhold
May 1, 2017 at 1:44	history	edited	Julian Rosen	CC BY-SA 3.0	edited body
May 1, 2017 at 1:14	comment	added	Julian Rosen		@GjergjiZaimi Yes, thank you. I amended the argument.
May 1, 2017 at 1:14	history	edited	Julian Rosen	CC BY-SA 3.0	added 363 characters in body
May 1, 2017 at 0:18	comment	added	Gjergji Zaimi		It seems to me that the S-unit equation only implies that the fraction $(a_{n+2}-a_{n+1})/(a_{n+1}-a_n)$ takes finitely many values. But this is enough for your argument to go through. One just has to rule out sequences of the form $ab^n+c$.
Apr 30, 2017 at 23:59	comment	added	kodlu		I thought I found a computational counterexample (haven't double checked), but a proof clearly beats that!
Apr 30, 2017 at 23:39	history	answered	Julian Rosen	CC BY-SA 3.0