Eigenvalue inequalities for the Markov diffusion operator

Inequalities for eigenvalues of the buckling problem of arbitrary order on bounded domains of

“…Universal inequalities of Payne–Pólya–Weinberger–Yang type for eigenvalues of Riemannian manifolds have been studied by many authors. One can find some of the interesting results about this topic, e.g., in [] and the references therein.…”