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Feb 13, 2020 at 14:39 history edited GH from MO
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Apr 16, 2015 at 20:16 vote accept Nikita Sidorov
Apr 16, 2015 at 19:06 comment added Nikita Sidorov No, this is not possible. For instance, $\ell(2^{2k+1}\asymp 5^k$, according to E. Golubeva (1990). Apparently, this was already known in the 19th century.
Apr 16, 2015 at 19:02 answer added GH from MO timeline score: 13
Apr 16, 2015 at 18:37 comment added Gerhard Paseman What can you say about numbers $d$ where $l$ is 1 or 2? Is it conceivable that the upper bound is constant? Gerhard "If You Dream, Dream Big" Paseman, 2015.04.16
Apr 16, 2015 at 18:29 history asked Nikita Sidorov CC BY-SA 3.0