A counterexample to a strong maximum principle for the sixth-order GJMS operator

Liuwei Gong, Mingxiang Li, Juncheng Wei

We exhibit an explicit closed seven-dimensional Riemannian manifold \[ (M,g)=\mathbb S^2(1)\times \mathbb S^5\left(\frac1{100}\right), \] where the displayed parameters denote sect…