Timeline for On the convexity of element-wise norm 1 of the inverse
Current License: CC BY-SA 3.0
5 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Mar 20, 2013 at 7:41 | vote | accept | Ferpect | ||
| Mar 20, 2013 at 7:41 | |||||
| Mar 19, 2013 at 20:05 | comment | added | Suvrit | Sorry, there was an obvious typo in there; of course, I mean hermitian positive def. matrices. Fixed now. | |
| Mar 19, 2013 at 20:04 | history | edited | Suvrit | CC BY-SA 3.0 |
fixed typo in the counterexample
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| Mar 19, 2013 at 17:36 | comment | added | Ferpect | Sorry, I don't get your answer... 1) X is not symmetric, let alone positive definite, My question regarded exclusively PD matrices. 2) if with $f$ you mean the functional $f(A)=\|A^{-1}\|_1$, then $f(Z)=3.46 < 3.5 = \frac{1}{2} (f(X)+f(Y))$ which does not violate convexity | |
| Mar 19, 2013 at 16:47 | history | answered | Suvrit | CC BY-SA 3.0 |