On the asymptotic behaviour of the restricted Dirichlet Laplacian of real order $s>0$ on stretching tubes

Roberta Musina, Giulio Romani

We study spectral and variational properties of the (possibly) fractional Dirichlet Laplacian ${\left(-{\Delta }_{n+k}\right)}^s$, $s>0$, on bounded subsets of $\mathbb R^n\times\mathbb R^…