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This article is cited in 27 scientific papers (total in 27 papers)
Cyclic covers that are not stably rational
J.-L. Colliot-Thélèneab, A. Pirutkac a Chebyshev Laboratory, St. Petersburg State University, Department of Mathematics and Mechanics
b Université de Paris-Sud Mathematiques, Département de Mathématique
c Ècole Polytechnique CNRS, Centre de Mathématiques Appliquées
Abstract:
Using methods developed by Kollár, Voisin, ourselves and Totaro, we prove that a cyclic cover of $\mathbb P_{\mathbb C}^n$, $n\geqslant 3$, of prime degree $p$, ramified along a very general hypersurface $f(x_0,\dots , x_n)=0$ of degree $mp$, is not stably rational if $m(p-1) <n+1\leqslant mp$. In dimension 3 we recover double covers of $\mathbb P^3_{\mathbb C}$ ramified along a very general surface of degree 4 (Voisin) and double covers of $\mathbb P^3_{\mathbb C}$ ramified along a very general surface of degree 6 (Beauville). We also find double covers of $\mathbb P^4_{\mathbb C}$ ramified along a very general hypersurface of degree 6. This method also enables us to produce examples over a number field.
Keywords:
stable rationality, Chow group of zero-cycles, cyclic covers.
Received: 06.07.2015
Citation:
J.-L. Colliot-Thélène, A. Pirutka, “Cyclic covers that are not stably rational”, Izv. RAN. Ser. Mat., 80:4 (2016), 35–48; Izv. Math., 80:4 (2016), 665–677
Linking options:
https://www.mathnet.ru/eng/im8429https://doi.org/10.1070/IM8429 https://www.mathnet.ru/eng/im/v80/i4/p35
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Abstract page: | 424 | Russian version PDF: | 56 | English version PDF: | 30 | References: | 58 | First page: | 17 |
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