Koch, H. "Decomposition Group and Ramification Group." §6.1 in Number Theory: Algebraic Numbers and Functions. Providence, RI: Amer. Math. Soc., pp. 172-176, 2000.
Koch, H. "Decomposition Group and Ramification Group." §6.1 in Number Theory: Algebraic Numbers and Functions. Providence, RI: Amer. Math. Soc., pp. 172-176, 2000.
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