Timeline for A curious determinant of quadratic forms
Current License: CC BY-SA 3.0
6 events
| when toggle format | what | by | license | comment | |
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| Dec 27, 2017 at 17:51 | history | edited | YCor |
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| Dec 27, 2017 at 17:38 | answer | added | Pietro Majer | timeline score: 6 | |
| Dec 27, 2017 at 11:33 | comment | added | Denis Serre | @darijgrinberg. Yes I do. | |
| Dec 27, 2017 at 11:00 | comment | added | darij grinberg | $X \otimes X$ means $XX^T$ ? | |
| Dec 27, 2017 at 10:29 | comment | added | Robert Bryant | You mean other than the fact that $S(a,X)$ is orthgonally equivalent to the sum of the $n=1$ case and a linear transformation on a space of dimension $(n{-}1)$ that is $\tfrac12(a^2-|X|^2)$ times the identity? (The $n=1$ case is simply the Pythagorean triple identity.) | |
| Dec 27, 2017 at 10:02 | history | asked | Denis Serre | CC BY-SA 3.0 |