Timeline for Does $A-A=\mathbb Q$ hold for $A=\{x^4+y^4:\ x,y\in\mathbb Q\}$?
Current License: CC BY-SA 4.0
9 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Dec 5 at 2:26 | comment | added | Guruprasad | @Tomita thank you for providing a web link. | |
| Dec 5 at 2:23 | comment | added | Tomita | @Guruprasad, I edited it. | |
| Dec 5 at 2:22 | history | edited | Tomita | CC BY-SA 4.0 |
added 43 characters in body
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| Dec 5 at 0:48 | comment | added | Guruprasad | @Tomita Given link is not working | |
| Feb 7, 2022 at 21:32 | comment | added | Wolfgang | The equation is the link. Scroll down to #4. :) | |
| Feb 7, 2022 at 16:09 | comment | added | Zhi-Wei Sun | See oeis.org/A351306 for a stronger conjecture of mine: Each $n\in\mathbb N$ can be written as $u^4+v^4-(x^4+y^4)$ with $u,v,x,y\in\mathbb Q$ and $x^4+y^4\le n^2$. Can this be explained via the identity? | |
| Feb 7, 2022 at 13:15 | comment | added | Zhi-Wei Sun | Tomita, thank you for pointing out the identity. Would you please proivde a website link for that identity? | |
| Feb 7, 2022 at 12:30 | vote | accept | Zhi-Wei Sun | ||
| Feb 7, 2022 at 11:36 | history | answered | Tomita | CC BY-SA 4.0 |