Timeline for The number 1680 and Lagrange's four-square theorem
Current License: CC BY-SA 4.0
3 events
| when toggle format | what | by | license | comment | |
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| Jun 11, 2018 at 5:11 | comment | added | Zhi-Wei Sun | On my request, Prof. Qing-Hu Hou at Tianjin Univ. has verified that each $n=0,1,\ldots,10^8$ can be written as $x^2+y^2+z^2+w^2$ ($x,y,z,w\in\mathbb N$) with $x^4+1680y^3z$ a square. | |
| Jun 11, 2018 at 3:54 | history | edited | Zhi-Wei Sun | CC BY-SA 4.0 |
added 1 character in body
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| Jun 11, 2018 at 3:36 | history | asked | Zhi-Wei Sun | CC BY-SA 4.0 |