Timeline for Shifting quadratic residues
Current License: CC BY-SA 4.0
4 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| May 24, 2019 at 9:44 | vote | accept | doe | ||
| May 23, 2019 at 22:58 | comment | added | Gerry Myerson | Also studied under the heading, "cyclotomy". | |
| May 23, 2019 at 22:26 | comment | added | Padraig Ó Catháin | This phenomenon is well known in combinatorial design theory. This calculation shows that the quadratic residues form a difference set in the additive group of a finite field when $q \equiv 3 \mod 4$. Generalisations of this result are studied as cyclotomic difference sets, and results are known for the quartic, septic and octic residues. | |
| May 23, 2019 at 19:14 | history | answered | Fedor Petrov | CC BY-SA 4.0 |