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M. S. Ashbaugh and R. D. Benguria, “More Bounds on Eigenvalues Ratios for Dirichlet Laplacians in n Dimensions,” SIAM Journal on Mathematical Analysis, Vol. 24, 1993, pp. 1622-1651. http://dx.doi.org/10.1137/0524091

has been cited by the following article:

• TITLE: Riesz Means of Dirichlet Eigenvalues for the Sub-Laplace Operator on the Engel Group

  AUTHORS: Jingjing Xue

  KEYWORDS: Engel Group; Sub-Laplace Operator; Eigenvalues; Riesz Mean

  JOURNAL NAME: Advances in Pure Mathematics, Vol.3 No.9B, December 24, 2013

  ABSTRACT: In this paper, we are concerned with the Riesz means of Dirichlet eigenvalues for the sub-Laplace operator on the Engel group and deriver different inequalities for Riesz means. The Weyl-type estimates for means of eigenvalues are given.