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Effective Hasse principle for the intersection of two quadrics

Published online by Cambridge University Press:  26 August 2016

Tony Quertier
Affiliation:
UMR 6139 - Laboratoire de Mathématiques Nicolas Oresme (LMNO), Université de Caen Normandie UFR des Sciences, Campus 2, Côte de nacre Bd Maréchal Juin, 14032 Caen cedex 5, France email tony.quertier@unicaen.fr
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Abstract

We consider a smooth system of two homogeneous quadratic equations over $\mathbb{Q}$ in $n\geqslant 13$ variables. In this case, the Hasse principle is known to hold, thanks to the work of Mordell in 1959. The only local obstruction is over $\mathbb{R}$ . In this paper, we give an explicit algorithm to decide whether a nonzero rational solution exists and, if so, compute one.

Type
Research Article
Copyright
© The Author 2016 

References

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