Can someone give me a proper reference (a book probably)for how a 3 dimensional representation of the Alternating group $A_5$ is related to the reflection group $H_3$ or the Icosahedral group ? Thanks
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$\begingroup$ You may not consider this as a "proper reference", but this could be interesting: youtube.com/watch?v=Zj5PE6r_Oeo (from the 12th min.) $\endgroup$ – Watson Aug 23 '16 at 18:54
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$\begingroup$ See also math.stackexchange.com/questions/130464 $\endgroup$ – Watson Aug 23 '16 at 20:05
