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math.NT2018
Universal Quadratic Forms and Indecomposables over Biquadratic Fields
Martin Čech, Dominik Lachman, Josef Svoboda +2
The aim of this article is to study (additively) indecomposable algebraic integers of biquadratic number fields and universal totally positive quadratic forms wi…
math.NT2017★ 16 cited
Universal quadratic forms over multiquadratic fields
Vítězslav Kala, Josef Svoboda
For all positive integers and we prove that there are infinitely many totally real multiquadratic fields of degree over such that each universal quadr…