Again nice equations for nice groups

Abhyankar, Shreeram

doi:10.1090/S0002-9939-96-03471-5

Again nice equations for nice groups
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by Shreeram S. Abhyankar

Proc. Amer. Math. Soc. 124 (1996), 2967-2976

DOI: https://doi.org/10.1090/S0002-9939-96-03471-5

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Abstract:

Nice quartinomial equations are given for unramified coverings of the affine line in nonzero characteristic $p$ with PSU$(2m-1,q’)$ and SU$(2m-1,q’)$ as Galois groups where $m>1$ is any integer and $q’>1$ is any power of $p$.

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