Timeline for About a result on Hadamard matrix
Current License: CC BY-SA 4.0
13 events
| when toggle format | what | by | license | comment | |
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| May 10, 2023 at 16:16 | vote | accept | Isomorphism | ||
| May 10, 2023 at 16:08 | answer | added | David E Speyer | timeline score: 6 | |
| May 5, 2023 at 8:59 | comment | added | Isomorphism | @FedorPetrov I think you are in the right direction. And the construction is named after Paley. Me a noob in (all kinds of) number theory, thus unable to proceed any further and struggling to find related papers. Thanks! | |
| May 5, 2023 at 8:55 | comment | added | Isomorphism | @GerryMyerson Yes, omitted it due to my laziness and possibly no misunderstanding. | |
| May 5, 2023 at 8:42 | history | edited | Isomorphism | CC BY-SA 4.0 |
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| May 5, 2023 at 8:38 | comment | added | Isomorphism | @kodlu I read that paper again and don't think the author implies that $l$ is even. The first sentence should be understood as '... for large $n$ and $l$ (even without) ...' Otherwise, it's a little bit tricky if '... for (large $n$) and ($l$ even) without...' In addition, the introduction part of 'Two Remarks on Eventown and Oddtown Problems' by Sudakov referring to this paper regards $l$ as an arbitrary number. | |
| May 5, 2023 at 6:04 | comment | added | Fedor Petrov | It should follow from some version of Goldbach (since there exist Hadamard matrices of order $2(p+1)$ for all odd prime $p$, this follows from Goldbach with many summands but additional condition that they are all of comparable size.) | |
| May 5, 2023 at 3:41 | comment | added | Gerry Myerson | Is there supposed to be a "for all $k$, $1\le k\le q$"? | |
| May 5, 2023 at 1:12 | history | edited | Isomorphism | CC BY-SA 4.0 |
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| May 4, 2023 at 21:14 | comment | added | kodlu | The paper actually says $l$ is even, you should transcribe more carefully | |
| May 4, 2023 at 21:07 | comment | added | kodlu | @CarloBeenakker, that is the Hadamard Conjecture, widely believed but open | |
| May 4, 2023 at 20:32 | comment | added | Carlo Beenakker | I thought Hadamard matrices existed for each size $4n$? | |
| May 4, 2023 at 14:55 | history | asked | Isomorphism | CC BY-SA 4.0 |