Counterexamples to the local-global principle associated with Swinnerton-Dyer's cubic form

Abstract

In this paper, we imitate a classical construction of a counterexample to the local-global principle of cubic forms of 4 variables which was discovered first by Swinnerton-Dyer (Mathematica (1962)). Our construction gives new explicit families of counterexamples in homogeneous forms of 4, 5, 6, ..., 2n + 2 variables of degree 2n + 1 for infinitely many integers n. It is contrastive to Swinnerton-Dyer's original construction that we do not need any concrete calculation in the proof of local solubility.