Timeline for Self-complementary block designs
Current License: CC BY-SA 3.0
5 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Mar 20, 2016 at 20:37 | comment | added | Dima Pasechnik | OK, I just proved that you were right, see my edited answer... | |
| Mar 20, 2016 at 19:21 | comment | added | Chris Godsil | @DimaPasechnik: It does not look obvious to me now, so I've backed down somewhat. | |
| Mar 20, 2016 at 19:21 | history | edited | Chris Godsil | CC BY-SA 3.0 |
weakened a claim
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| Mar 20, 2016 at 16:57 | comment | added | Dima Pasechnik | It does not look obvious why one would always get a Hadamard matrix from the design: for this one has to show that for any two pairs $P$, $P'$ of complementary blocks, converted into $\pm 1$-vectors $v$, $v'$, one has $\langle v,v'\rangle=0$. | |
| Mar 20, 2016 at 16:10 | history | answered | Chris Godsil | CC BY-SA 3.0 |