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Feb 25, 2019 at 21:43 comment added Judah Greenblatt Counter example where there are an infinite number of infinite arithmetic progressions and NO progression has the difference equal to the initial term. for k from 1 to inf { S(k) = 2^k * n + 2 ^ (k-1) for n from 0 to inf } S(1) is odd integers; S(2) is 2, 6, 10 - twice an odd integer; and continues for powers of 2. In all cases the initial term is the difference / 2.
S Feb 25, 2019 at 21:02 history suggested Rodrigo de Azevedo CC BY-SA 4.0
Minor improvements. Added source of problem.
Feb 25, 2019 at 19:55 review Close votes
Mar 2, 2019 at 20:22
Feb 25, 2019 at 19:33 review Suggested edits
S Feb 25, 2019 at 21:02
Feb 25, 2019 at 15:54 vote accept VRS
Feb 25, 2019 at 15:43 answer added Fedor Petrov timeline score: 7
Feb 25, 2019 at 15:27 comment added VRS Sorry I should’ve asked for counter example also. I have edited the question now. The source is the variant mentioned below the main question which is an exercise from “A Walk Through Combinatorics”.
Feb 25, 2019 at 15:25 history edited VRS CC BY-SA 4.0
added 12 characters in body
Feb 25, 2019 at 14:30 comment added Fedor Petrov What is the origin of this question? Usually if you ask to "prove" something you should have some strong evidence that the proof exists.
Feb 25, 2019 at 13:30 review First posts
Feb 25, 2019 at 14:26
Feb 25, 2019 at 13:28 history asked VRS CC BY-SA 4.0