Timeline for Computing signature
Current License: CC BY-SA 3.0
4 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Nov 17, 2012 at 9:42 | comment | added | Markus Schweighofer | @Denis: For polynomials with all roots real, Descartes' rule gives the exact number of roots. | |
| Sep 20, 2012 at 15:37 | comment | added | Denis Serre | @David. Descartes' rule does not give the exact number of positive roots of a polynomial, but only an upper bound, and an information mod 2. | |
| Sep 19, 2012 at 20:38 | comment | added | David E Speyer | Since we know that all the roots of the characteristic polynomial will be real, why not just use Descartes' Rule of signs to compute how many of them are positive? | |
| Sep 19, 2012 at 20:25 | history | answered | Denis Serre | CC BY-SA 3.0 |