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Zur Verteilung der Quadrate ganzer Zahlen in rationalen Quaternionenalgebren
Authors:Gerald Kuba
Institution:1. Institut für Mathematik u.a.St., Universit?t für Bodenkultur, Peter Jordan-Stra?e 82, A-1 190, Wien, ?sterreich
Abstract:For γ ∈ ?letQ 〈γ〉 = ?i]+?i]j. where j. is a hypercomplex number withj2 = γ, and define addition and multiplication formally with respect to $zj = j\overline z $ for all z ∈ ?i], so thatQ〈γ〉 becomes a quaternion algebra over the rationals. Further fix γ s.t.Q 〈γ 〉 is a division algebra and define for real X ≥ 1 ></img>                                </span>                              </span> where<span class= ></img>                                </span>                              </span> |Re(α)|, |Im(α)|, |Re(β)|, |Im(ö)|≤ X and<span class= ></img>                                </span>                              </span>                                                        Generalizing former results concerning Hamilton’s quaternions (i.e. the case γ =- 1) we show that, as X → ∞,<span class= ></img>                                </span>                              </span> when γ < 0,<span class= ></img>                                </span>                              </span> when γ > 0,<span class= ></img>                                </span>                              </span> when γ < 0,<span class= ></img>                                </span>                              </span> wheny γ 0.                            Thereby δ(t) is any upper bound of the error term in Dirichlet’s divisor problem, e.g. δ(t) =<span class=t0.315, Cγ, Dγ > 0 are numerical constants, and c, d are given by c := π(1 + log 2 - 2η) and d := π2(1 + 4 log 4 - 4π)/8, where π = 0.577 … is Euler’s constant.
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