Uniform Sobolev, interpolation and geometric Calderón-Zygmund inequalities for graph hypersurfaces

In this note, our aim is to show that families of smooth hypersurfaces of ${\mathbb{R}}^{n+1}$ which are all $C^1$–close enough to a fixed compact, embedded one, have uniformly bounded constants in some relevant inequalities for mathematical analysis, like Sobolev, Gagliardo-Nirenberg and ``geometric’’ Calderón-Zygmund inequalities. This technical result is quite useful, in particular, in the study of the geometric flows of hypersurfaces.