참고문헌
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W. Sinnott, On
$the{\mu}$ -invariant of$the{\Gamma}$ -transform of a rational function, Invent. Math. 75 (1984), no. 9, 273-282 https://doi.org/10.1007/BF01388565 - L. Washington, Introduction to Cyclotomic Fields, Graduate Text in Math., Vol. 83, Springer- Verlag, 1982