Constant angle surfaces in \(\mathbb H^{2} \times \mathbb R\) (Q2271922)

Let \(H^2 \times\mathbb R\) be the Riemannian product of a two-dimensional real hyperbolic plane with constant sectional curvature \(-1\) and a Euclidean line. The authors classify all surfaces in \(H^2 \times\mathbb R\) for which the angle between the normal spaces of the surface and the Euclidean line \(\mathbb R\) in the product is constant.