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Mar 14 at 21:20 comment added Ian Gershon Teixeira are all groups of central type 2-step nilpotent?
Feb 13, 2023 at 15:50 history edited LSpice CC BY-SA 4.0
Typo, while this is on the front page
Nov 14, 2021 at 19:52 comment added Ian Gershon Teixeira You're right just a misunderstanding! Everything sounds good then, thanks again for the great answer!
Nov 14, 2021 at 19:47 comment added Frieder Ladisch I'm not sure what you mean, but maybe there is a misunderstanding here: I do not claim that the extraspecial group with $3^3$ elements has such a representation over the reals. I claim that when $G$ is a group of $3\times 3$ matrices over some field as in your question, then that field must contain primitive 3rd roots of unity.
Nov 14, 2021 at 19:28 vote accept Ian Gershon Teixeira
Nov 14, 2021 at 19:28 comment added Ian Gershon Teixeira Everything in here looks great thanks so much! The one question I still have is could you give an example of the general result over (non algebraically closed) fields. For example could you give a 3 dimensional real representation of the extraspecial 3-group with $ 3^3=27 $ elements. I am a bit surprised that this exitsts.
Nov 13, 2021 at 18:12 history answered Frieder Ladisch CC BY-SA 4.0