Timeline for Matrices whose inverse is positive
Current License: CC BY-SA 4.0
7 events
| when toggle format | what | by | license | comment | |
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| Sep 15, 2019 at 18:29 | history | edited | Carlo Beenakker | CC BY-SA 4.0 |
repaired two broken links
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| Mar 19, 2012 at 5:47 | comment | added | Aaron Tikuisis | Maybe I'm a little slow, but I still don't see it. David seems to have simply computed the inverse and shown that the entries are nonnegative - which does answer the question, but doesn't seem to shed light on where $M$-matrices come into play. | |
| Mar 18, 2012 at 19:07 | comment | added | Anatoly Kochubei | The possibility to change some signs follows from David Speyer's answer. | |
| Mar 18, 2012 at 18:12 | vote | accept | hydrobates | ||
| Mar 18, 2012 at 13:21 | comment | added | Denis Serre | I support Aaaron's comment. Read about $M$-matrices! | |
| Mar 18, 2012 at 10:52 | comment | added | Aaron Tikuisis | It seems that these papers deal with $M$-matrices, which, it seems, means matrices $A$ such that: (i) $A$ is invertible and every entry of $A^{-1}$ is nonnegative; and (ii) The off-diagonal entries of $A$ are nonpositive. By contrast, the question seems to refer to matrices which satisfy (i) but for which the off-diagonal entries are positive (plus other conditions). Is there a clear way to relate the question to $M$-matrices? | |
| Mar 18, 2012 at 9:33 | history | answered | Anatoly Kochubei | CC BY-SA 3.0 |