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Rational points and derived equivalence

Published online by Cambridge University Press:  30 April 2021

Nicolas Addington
Affiliation:
Department of Mathematics, University of Oregon, Eugene, OR 97403-1222, USA adding@uoregon.edu
Benjamin Antieau
Affiliation:
Department of Mathematics, Northwestern University, 2033 Sheridan Road, Evanston, IL 60208, USA antieau@northwestern.edu
Katrina Honigs
Affiliation:
Department of Mathematics, University of Oregon, Eugene, OR 97403-1222, USA honigs@uoregon.edu
Sarah Frei
Affiliation:
Department of Mathematics, Rice University, 6100 Main Street, Houston, TX 77005-1892, USA sarah.frei@rice.edu

Abstract

We give the first examples of derived equivalences between varieties defined over non-closed fields where one has a rational point and the other does not. We begin with torsors over Jacobians of curves over $\mathbb {Q}$ and $\mathbb {F}_q(t)$, and conclude with a pair of hyperkähler 4-folds over $\mathbb {Q}$. The latter is independently interesting as a new example of a transcendental Brauer–Manin obstruction to the Hasse principle. The source code for the various computations is supplied as supplementary material with the online version of this article.

Information

Type
Research Article
Copyright
© The Author(s) 2021

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