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May 3, 2018 at 15:37 vote accept Đào Thanh Oai
May 3, 2018 at 15:04 history edited Alexey Ustinov
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May 3, 2018 at 14:59 history edited Alexey Ustinov
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May 3, 2018 at 14:59 answer added Alexey Ustinov timeline score: 2
May 3, 2018 at 14:48 comment added Alexey Ustinov You can swap neighbouring sides of cyclic polygon. So it is sufficient to prove your conjecture when $a_i=b_i$.
May 3, 2018 at 14:46 history edited Đào Thanh Oai CC BY-SA 4.0
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May 3, 2018 at 14:31 history edited Đào Thanh Oai CC BY-SA 4.0
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May 3, 2018 at 14:14 history edited Đào Thanh Oai CC BY-SA 4.0
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May 3, 2018 at 14:08 history edited Đào Thanh Oai CC BY-SA 4.0
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May 3, 2018 at 14:03 history asked Đào Thanh Oai CC BY-SA 4.0