Universal unramified cohomology of cubic fourfolds containing a plane
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cohomologyunramifiedcontainingcubicplaneuniversalcomplexfourfold
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We prove the universal triviality of the third unramified cohomology group of a very general complex cubic fourfold containing a plane. The proof uses results on the unramified cohomology of quadrics due to Kahn, Rost, and Sujatha.
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