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This article is cited in 3 scientific papers (total in 3 papers)
On the standard conjecture for complex 4-dimensional elliptic varieties
S. G. Tankeev Vladimir State University
Abstract:
We prove that the Grothendieck standard conjecture $B(X)$ of Lefschetz
type on the algebraicity of operators $\ast$ and $\Lambda$ of Hodge
theory holds for every smooth complex projective model $X$ of the fibre
product $X_1\times_C X_2$, where $X_1\to C$ is an elliptic surface over
a smooth projective curve $C$ and $X_2\to C$ is a morphism of a smooth
projective threefold onto $C$ such that one of the following
conditions holds: a generic geometric fibre $X_{2s}$ is an Enriques
surface; all fibres of the morphism $X_2\to C$ are smooth
$\mathrm{K}3$-surfaces and the Hodge group $\operatorname{Hg}(X_{2s})$
of the generic geometric fibre $X_{2s}$ has no geometric simple factors
of type $A_1$ (the assumption on the Hodge group holds automatically if the
number $22-\operatorname{rank}\operatorname{NS}(X_{2s})$ is not divisible
by 4).
Keywords:
elliptic variety, standard conjecture of Lefschetz type,
Enriques surface, $\mathrm{K}3$-surface, Hodge group, algebraic cycle.
Received: 08.08.2011
Citation:
S. G. Tankeev, “On the standard conjecture for complex 4-dimensional elliptic varieties”, Izv. RAN. Ser. Mat., 76:5 (2012), 119–142; Izv. Math., 76:5 (2012), 967–990
Linking options:
https://www.mathnet.ru/eng/im7826https://doi.org/10.1070/IM2012v076n05ABEH002612 https://www.mathnet.ru/eng/im/v76/i5/p119
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Abstract page: | 513 | Russian version PDF: | 171 | English version PDF: | 12 | References: | 60 | First page: | 14 |
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