  This Master's thesis presents a study of the basic properties of the
s-fractional perimeter and of the regularity theory of the corresponding
s-minimal sets. In particular, we give full detailed proofs for all the
Theorems contained in the article "Nonlocal Minimal Surfaces" by Caffarelli,
Roquejoffre and Savin, where these s-minimal sets were introduced and studied
for the first time.
