Timeline for Determinant of a specific $4 \times 4$ symmetric matrix
Current License: CC BY-SA 3.0
3 events
| when toggle format | what | by | license | comment | |
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| Aug 20, 2016 at 12:12 | comment | added | Clément de Seguins Pazzis | Thank you very much. On the significance of the determinant being a square: if the ring is a field and the determinant is nonzero then the matrix under consideration turns out to represent the polar form $(x,y) \mapsto N(x+y)-N(x)-N(y)$ of the norm $N$ of some quaternion algebra. This can be used to give an alternative proof of the formula but it requires a lot of additional background. | |
| Aug 20, 2016 at 11:53 | vote | accept | Clément de Seguins Pazzis | ||
| Aug 20, 2016 at 11:09 | history | answered | Colin McQuillan | CC BY-SA 3.0 |