Sur le groupe de Chow de codimension deux des variétés sur les corps finis

Mathematics – Algebraic Geometry

Scientific paper

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15 pages, arguments in the section 2 are simplified

Scientific paper

Using the construction of Colliot-Th\'el\`ene and Ojanguren, we exhibit an
example of a smooth projective geometrically rational variety X defined over a
finite field F_p with an algebraic closure \bar F_p and the absolute Galois
group G, such that the group H^3_nr(X, Z/2) is nonzero and the map CH^2(X)\to
CH^2(\bar X)^G is not surjective.

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