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Apr 13, 2017 at 12:19 history edited CommunityBot
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Jun 30, 2015 at 16:37 vote accept Iosif Pinelis
Jun 29, 2015 at 6:20 answer added Denis Serre timeline score: 5
Jun 28, 2015 at 18:43 comment added Iosif Pinelis Sergei: I don't see how the AGM inequality could be useful here. It works well when the terms are close to one another. But this is not the (extremal) case here, even if you rewrite the differences $a_j-a_i$ as the sums of some of the $h_k$'s, where $h_k:=a_k-a_{k-1}$.
Jun 28, 2015 at 18:01 answer added Iosif Pinelis timeline score: 3
Jun 28, 2015 at 9:05 comment added Sergei The AGM inequality gives an upper bound with sum instead of the product. Are there a close form for this sum? By all means many terms in this sum are cancelled, is not it possible to find the close form for the rest?
Jun 26, 2015 at 22:16 answer added Noam D. Elkies timeline score: 8
Jun 26, 2015 at 19:01 history edited Ricardo Andrade
replaced new tags with well-established ones
Jun 26, 2015 at 18:41 answer added ofer zeitouni timeline score: 11
Jun 26, 2015 at 17:37 history asked Iosif Pinelis CC BY-SA 3.0