Timeline for What is known about the eigenvectors of the $2^n \times 2^n$ Hadamard matrix?
Current License: CC BY-SA 4.0
5 events
| when toggle format | what | by | license | comment | |
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| Oct 6, 2019 at 10:24 | comment | added | Geoff Robinson | @GerhardPaseman : Well, a scalar multiple of a unitary matrix.... | |
| Oct 5, 2019 at 21:07 | history | edited | Geoff Robinson | CC BY-SA 4.0 |
typo, and explanation of span of eigenspaces.
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| Oct 5, 2019 at 20:31 | comment | added | Geoff Robinson | @GerhardPaseman : Usually, the character table of a finite Abelian group is just a unitary matrix. In this case, we have the unusual fact that it is also symmetric, which makes it a matrix of multiplicative order $2$. This gives some special properties, which would not apply for the orders you mention. | |
| Oct 5, 2019 at 20:23 | comment | added | Gerhard Paseman | Interesting. Do any of these remarks apply or extend to other orders? In particular, what can be said for orders 12,20, and 24? Gerhard "Hadamard Minds Want To Know" Paseman, 2019.10.05. | |
| Oct 5, 2019 at 19:54 | history | answered | Geoff Robinson | CC BY-SA 4.0 |