Mathematics > Algebraic Geometry
[Submitted on 27 May 2025
(v1)
, last revised 7 Jun 2025 (this version, v2)]
Title: Variétés réelles connexes non stablement rationnelles
Title: 非稳定有理的实连通簇
Abstract: Let $R$ be the field of real Puiseux series. It is a real closed field. We construct the first examples of smooth intersections of two quadrics in $\mathbb{P}_R^5$ and smooth cubic hypersurfaces in $\mathbb{P}_R^4$ which are not stably rational but for which the space $X(R)$ of $R$-points is semi-algebraically connected. The question of constructing such examples over the field of real numbers $\mathbb{R}$ remains open.
Submission history
From: Federico Scavia [view email][v1] Tue, 27 May 2025 17:50:05 UTC (35 KB)
[v2] Sat, 7 Jun 2025 11:29:58 UTC (37 KB)
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