Abstract
The Dedekind zeta function ζF(s) of an algebraic number field F is the most important invariant of F. Its Euler product tells how the unramified primes of Q split in F. Information about the ramified primes and about the behavior at infinity is contained in three integers Δ, n+ and n−: the first is the absolute value of the discriminant of F and is a positive integer whose prime divisors are precisely the primes ramifying in F, and the other two (= r 1 + r 2 and r 2 in the standard notation) give the dimensions of the (+1)- and (− l)-eigenspaces of complex conjugation on \( F{ \otimes_{\mathbb{Q}}}\mathbb{R}\left( {{\mathbb{R}^{{{r_1}}}} \times {\mathbb{C}^{{{r_2}}}}} \right) \) . These invariants are in turn determined by ζF(s) via its functional equation
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Zagier, D. (1991). Polylogarithms, Dedekind Zeta Functions, and the Algebraic K-Theory of Fields. In: van der Geer, G., Oort, F., Steenbrink, J. (eds) Arithmetic Algebraic Geometry. Progress in Mathematics, vol 89. Birkhäuser, Boston, MA. https://doi.org/10.1007/978-1-4612-0457-2_19
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