Timeline for Can the sum of two roots of unity be a root of unity?
Current License: CC BY-SA 3.0
4 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Apr 21, 2013 at 13:45 | vote | accept | Liss | ||
| Apr 9, 2013 at 13:46 | comment | added | user9072 | @Liss: in case you should also need information what is and is not possible in more general situations the following paper and references there could be useful arxiv.org/abs/math/9511209 | |
| Apr 9, 2013 at 13:41 | comment | added | Liss | Yes, $p$ was intended to be prime, I included it now in the question. Thanks for the answer, and considering two sums from the left and right was the thing that I needed, as well as obtaining that only a linear combination produced from the fact that the sum of the roots is zero is a possible equality. And its great that it turns out the answer is $no$, if the number of entries $|I|+|J|< p...$ | |
| Apr 9, 2013 at 13:04 | history | answered | Douglas Zare | CC BY-SA 3.0 |