Galois groups of $\binom{n}{0} + \binom{n}{1} X + \ldots + \binom{n}{6} X^6
We show that the Galois group of the polynomial in the title is isomorphic to the full symmetric group on six symbols for all but finitely many $n$. This complements earlier work of Filaseta and Moy, who studied Galois groups of $\binom{n}{0} + \binom{n}{1} X + \ldots + \binom{n}{k} X^k$ for more ge...
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Zusammenfassung: | We show that the Galois group of the polynomial in the title is isomorphic to
the full symmetric group on six symbols for all but finitely many $n$. This
complements earlier work of Filaseta and Moy, who studied Galois groups of
$\binom{n}{0} + \binom{n}{1} X + \ldots + \binom{n}{k} X^k$ for more general
pairs $(n,k)$, but had to admit a possibly infinite exceptional set
specifically for $k=6$ of at most logarithmic growth in $n$. The proof rests
upon invoking Faltings' theorem on a suitable fibration of Galois resolvents to
show that this exceptional set is, in fact, finite. |
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DOI: | 10.48550/arxiv.2304.12658 |