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Sep 30, 2025 at 19:14 comment added Yaakov Baruch There is some information about it in Tito Piezas III's A Collection of Algebraic Identities. You can google the sentence "which takes care of the first condition and modifies the second to" and a couple of sites will show up. That sentence will take you to where the equation above is mentioned.
Sep 30, 2025 at 18:42 answer added Guruprasad timeline score: 0
Apr 30, 2016 at 13:29 vote accept veg_nw
Apr 30, 2016 at 10:52 comment added veg_nw Yes, the square is perfect square.
Apr 30, 2016 at 10:51 answer added joro timeline score: 1
Apr 30, 2016 at 9:21 history edited Ben McKay CC BY-SA 3.0
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S Apr 30, 2016 at 9:20 history suggested Amir Sagiv
If it was studied by Euler, then a reference request is in hand
Apr 30, 2016 at 9:15 comment added Fedor Petrov @Amir I guess it is 'a perfect square'
Apr 30, 2016 at 9:08 comment added Amir Sagiv I may not be familiar with the field, but what does the ractangle sign mean in this context ?(for me it's a d'alembertian)
Apr 30, 2016 at 9:07 review Suggested edits
S Apr 30, 2016 at 9:20
Apr 30, 2016 at 9:04 history asked veg_nw CC BY-SA 3.0