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On the Pythagoras number of the simplest cubic fields

Volume 208 / 2023

Magdaléna Tinková Acta Arithmetica 208 (2023), 325-354 MSC: Primary 11R16; Secondary 11E25, 11R80. DOI: 10.4064/aa221003-27-6 Published online: 28 August 2023

Abstract

Let $\rho $ be a root of the polynomial $x^3-ax^2-(a+3)x-1$ where $a\geq 3$. We show that the Pythagoras number of the order $\mathbb Z[\rho ]$ is equal to $6$.

Authors

  • Magdaléna TinkováDepartment of Algebra
    Faculty of Mathematics and Physics
    Charles University
    186 00 Praha 8, Czech Republic
    and
    Faculty of Information Technology
    Czech Technical University in Prague
    160 00 Praha 6, Czech Republic
    e-mail

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