A sharp curvature lower bound for the first exterior p-harmonic Steklov eigenvalue

In this paper, we study the first variational Steklov eigenvalue of the $ p$-Laplace equation on exterior domain $ Ω^{\text{ext}}$ for $ 1< p <n$. If $ Ω$ is convex and $ \partial Ω\in C^{1,1}$, we prove a sharp lower bound in terms of $p$-logarithmic mean of the principal curvatures of $ \partial Ω