Timeline for Reference request: a class of matrices leading to interesting metric geometry
Current License: CC BY-SA 4.0
8 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| S Feb 26, 2021 at 18:01 | history | bounty ended | CommunityBot | ||
| S Feb 26, 2021 at 18:01 | history | notice removed | CommunityBot | ||
| Feb 18, 2021 at 16:33 | comment | added | Steve Huntsman | I should also mention that I know about *-matrices with * = L, M, Z, etc. Neither these nor diagonally dominant matrices seem particularly relevant. | |
| Feb 18, 2021 at 16:31 | comment | added | Steve Huntsman | @TimCampion- There are two constraints, one mandatory [$\Delta(\Delta(A))^{-1}11^T \ge A$, i.e., the diagonal entries are greater than or equal to the other entries in their row] and one optional but highly preferred [$A_{j\ell}A_{\ell k} \le A_{jj}A_{jk}$, which turns out to be a rephrasing of the triangle inequality]. | |
| Feb 18, 2021 at 16:17 | comment | added | Tim Campion | I think there's something I'm not understanding. As you introduce it, $A$ is just any invertible matrix with positive entries, so I don't think you're really asking if such matrices $A$ appear in the literature -- do you rather mean "do such metrics $d$ appear in the literature?" or something like that? | |
| S Feb 18, 2021 at 16:10 | history | bounty started | Steve Huntsman | ||
| S Feb 18, 2021 at 16:10 | history | notice added | Steve Huntsman | Draw attention | |
| Feb 16, 2021 at 16:02 | history | asked | Steve Huntsman | CC BY-SA 4.0 |