Timeline for Is this subset of matrices contractible inside the space of non-conformal matrices?
Current License: CC BY-SA 4.0
10 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Mar 3, 2020 at 14:38 | vote | accept | Asaf Shachar | ||
| Mar 3, 2020 at 14:37 | comment | added | Asaf Shachar | @macbeth Indeed, Moishe Kohan is right. (the two definitions coincide). In the case of $2 \times 2$ matrices, they are not conformal if and only the two singular values are different. | |
| Mar 3, 2020 at 4:02 | comment | added | Moishe Kohan | @macbeth: A matrix is a scalar multiple of an orthogonal matrix if and only if all its singular values are equal. | |
| Mar 3, 2020 at 3:12 | comment | added | macbeth | @MoisheKohan, this turns out not to be the OP's definition (see my answer below). | |
| Mar 2, 2020 at 11:33 | answer | added | Dmitri Panov | timeline score: 2 | |
| Mar 2, 2020 at 9:41 | history | edited | Asaf Shachar | CC BY-SA 4.0 |
I have added some topological insights and cleaned up the presentation.
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| Feb 29, 2020 at 15:39 | answer | added | macbeth | timeline score: 0 | |
| Feb 26, 2020 at 18:51 | comment | added | Moishe Kohan | A conformal matrix is a nonzero scalar multiple of an orthogonal matrix. | |
| Feb 26, 2020 at 17:09 | comment | added | Igor Belegradek | What is a conformal matrix? I thought fractional linear transformations are conformal but this is probably not what you mean. | |
| Feb 26, 2020 at 15:00 | history | asked | Asaf Shachar | CC BY-SA 4.0 |