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2018/93/1-2 (18) — DOI: 10.5486/PMD.2018.8252 — pp. 253-260

An interesting quartic surface, everywhere locally solvable, with cubic point but no global point

Authors: Andrew Bremner and Tho Nguyen Xuan

Abstract:

There seem few examples in the literature of quartic surfaces defined over $\mathbb{Q}$ that are everywhere locally solvable, yet which have no global point. It is a delicate question as to whether such surfaces can possess points defined over an odd-degree number field, and to our knowledge no previous example is known. We give here an example of such a diagonal quartic surface which contains a point defined over a cubic extension field (and it follows that there exist number fields of every odd degree greater than $1$ in which the surface has points). This surface is one member of a more general family of surfaces, each of which is also everywhere locally solvable but with no rational point.

Keywords: quartic surface, Hilbert symbol

Mathematics Subject Classification: 11G35, 11D25, 14G05, 14G25