Lower bound estimates for the rank of universal quadratic forms in some families of real cubic fields with density one

Liwen Gao; Xuejun Guo

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arXiv · 2305.19566

Lower bound estimates for the rank of universal quadratic forms in some families of real cubic fields with density one

Liwen Gao·Xuejun Guo

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Abstract

In this paper, we establish the explicit lower bound estimates for the rank of universal quadratic forms in some certain families of real cubic fields under the condition of density one. The more general results that represent all multiples of a given rational integer are obtained for totally positive definite quadratic lattices. Our main tools are some properties of indecomposable integers with trace in these fields and short vectors in quadratic lattices.

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BibTeX RIS

Liwen Gao, Xuejun Guo. 2023-05-31. Lower bound estimates for the rank of universal quadratic forms in some families of real cubic fields with density one. https://arxiv.org/abs/2305.19566

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