Timeline for Showing that a certain matrix is not positive definite
Current License: CC BY-SA 3.0
4 events
| when toggle format | what | by | license | comment | |
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| Sep 29, 2016 at 16:36 | history | edited | Noam D. Elkies | CC BY-SA 3.0 |
Change X_M to X_B now that the OP made the corresponding (logical) change in the question.
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| Sep 29, 2016 at 2:21 | vote | accept | Jernej | ||
| Sep 29, 2016 at 0:35 | comment | added | Noam D. Elkies | Likewise for $k=11$, $k=19$, and presumably an exercise to prove it for all larger prime powers congruent to $3 \bmod 4$ (though not $3$ itself). | |
| Sep 28, 2016 at 23:39 | history | answered | Noam D. Elkies | CC BY-SA 3.0 |