Failure of the Hasse principle for Enriques surfaces


Abstract in English

We construct an Enriques surface X over Q with empty etale-Brauer set (and hence no rational points) for which there is no algebraic Brauer-Manin obstruction to the Hasse principle. In addition, if there is a transcendental obstruction on X, then we obtain a K3 surface that has a transcendental obstruction to the Hasse principle.

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