Existence of infinitely many minimal hypersurfaces in closed manifolds

Using min-max theory, we show that in any closed Riemannian manifold of dimension at least 3 and at most 7, there exist infinitely many smoothly embedded closed minimal hypersurfaces. It proves a conjecture of S. -T. Yau. This paper builds on the methods developed by F. C. Marques and A. Neves.