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Timeline for Huygens' final unproved inequality

Current License: CC BY-SA 4.0

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Jul 28 at 15:49 comment added Mark B Villarino @IosifPinelis..your proof is the first known proof of Huygens' final inequality. Huygens, himself, writes that he obtained it by a more detailed study of the barycenter of a circular segment, but he gave no more details. He just states it without proof. Shuh gave a proof, using the position of the barycenter, of the inequality with "27" as the constant instead of "8" as in the above inequality. There is no known barycenter proof of his original inequality. I had hoped to furnish one using the inequality on the barycenter which I proposed and you proved. But, no luck so far.
Jul 28 at 2:17 comment added Iosif Pinelis Do you have a response to the answer below?
Jul 24 at 3:47 history became hot network question
Jul 23 at 21:31 history edited LSpice CC BY-SA 4.0
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Jul 23 at 21:17 answer added Iosif Pinelis timeline score: 15
Jul 23 at 19:56 history edited Mark B Villarino CC BY-SA 4.0
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Jul 23 at 19:46 history asked Mark B Villarino CC BY-SA 4.0