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A general theorem on representation of numbers by some ternary quadratic forms. (Q2594064)

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A general theorem on representation of numbers by some ternary quadratic forms.
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    A general theorem on representation of numbers by some ternary quadratic forms. (English)
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    1939
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    Ist \(\varPhi(x, y, z)\) eine eigentlich primitive positive ternäre quadratische Form, die zu den ungeraden relativ primen Invarianten \([\varDelta, \,\varOmega]\) gehört, so läßt sich jede zu \(2 \varOmega \varDelta\) relativ prime Zahl \(M\), für die die Kongruenz \(M \equiv \varPhi(\xi, \,\eta, \,\zeta)\pmod{8 \varOmega \varDelta}\) lösbar ist, und die einen quadratischen Teiler \(q^2>c(\varOmega, \varDelta)\) enthält, durch \(\varPhi(x, y, z)\) darstellen. Der Beweis gründet sich auf Sätze von \textit{S. Smith} [On the orders and genera of ternary quadratic forms. Proc. R. Soc. Lond. 16, 197--208 (1868; JFM 01.0054.03)] und \textit{V. Tartakovskiĭ} [Bull. Acad. Sci. Leningr. (Izv. Akad. Nauk SSSR) (7) 1929, No. 1, 111--122 (1929); 1929, No. 2, 165--196 (1929; JFM 56.0882.04)]. Es werden gewisse als ``Hermitionen'' bezeichnete quaternäre hyperkomplexe Zahlen verwendet.
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