This result states minimality of clifford cones and stability of the simons cone: given p,q 1 be integers, and define the cone C p,q = \ (x,y) R p+1 q+1 : q|x| 2=p|y| 2\ . Then the regular hypersurface C p,q reg :=C p,q \ 0\ is minimal in R p+q+2 . In the.... It is useful in the variational theory of minimal submanifolds, where variational identities, curvature estimates, and compactness arguments control geometric objects.