
doi: 10.5802/jtnb.976
Let K be a number field, A be its ring of integers and p be a prime number. In this paper, we define a function μ K ( p ) which counts the number of θ ¯ ∈ A / p A such that the index of θ is divisible by p . We give as well an explicit formula for it. Moreover, we show that the value of μ K ( p ) determines in some cases the splitting type of p in K .
common factor of indices., Algebraic numbers; rings of algebraic integers, Dedekind theorem
common factor of indices., Algebraic numbers; rings of algebraic integers, Dedekind theorem
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