Timeline for Factorization of a real matrix into Hermitian x Hermitian. Is it stable ?
Current License: CC BY-SA 3.0
5 events
| when toggle format | what | by | license | comment | |
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| Jan 16, 2014 at 20:34 | history | edited | Bill Johnson | CC BY-SA 3.0 |
Fixed formatting error.
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| Sep 7, 2011 at 0:45 | comment | added | Bill Johnson | Right, Denis, except that there is the additional strange point that you apparently need to keep $\|T^{-1}\|$ bounded. | |
| Sep 6, 2011 at 20:59 | comment | added | Denis Serre | Thanks Bill. I see the main point: if $T$ has real eigenvalues, it is similar to $T^*$. In addition, the similarity can be written thanks to a Hermitian change of basis. There remains to choose a $T$ with such an eigenbasis that the similarity is ill-conditioned. | |
| Sep 6, 2011 at 20:55 | vote | accept | Denis Serre | ||
| Sep 6, 2011 at 17:39 | history | answered | Bill Johnson | CC BY-SA 3.0 |