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Aug 24, 2021 at 9:14 comment added Noam D. Elkies It's worth noting that if we allow $G = {\rm PSL}_2(k)$ for non-prime finite fields $k$ then there's the striking further example of $|k|=9$ when $G$ is isomorphic with the alternating group $A_6$ !
Aug 22, 2021 at 17:06 answer added Geoff Robinson timeline score: 9
Aug 22, 2021 at 5:34 vote accept abx
Aug 22, 2021 at 5:11 answer added Mikko Korhonen timeline score: 10
Aug 21, 2021 at 19:09 answer added David E Speyer timeline score: 15
Aug 21, 2021 at 16:31 answer added Wojowu timeline score: 33
Aug 21, 2021 at 14:35 comment added YCor Citeseerx link to Kantor's paper. Relevant excerpt: "The first published proof that no exceptions occur for prime 4 > 11 is due to Jordan [17] (reproduced in [19, pp. 666-6671)." [17] C. Jordan. Note sur les équations modulaires, C. R. Acad. Sci. Paris 66 (1868), 308-312. [19] C. Jordan. “Traité des Substitutions et des Equations Algébriques,” Gauthier-Villars, Paris, 1870.
Aug 21, 2021 at 14:07 comment added Sean Eberhard According to Kantor (see "historical remarks" in mathscinet.ams.org/mathscinet-getitem?mr=549102), the first published proof is due to Jordan.
Aug 21, 2021 at 14:03 history edited YCor
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Aug 21, 2021 at 13:43 history asked abx CC BY-SA 4.0