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P. Lvy-Bruhl, “Rsolubilit Locale et Global d’Opra-Teurs Invariants du Second Order sur des Group de Lie Nilpotents,” Bulletin des Sciences Mathématiques, Vol. 104, No. 2, 1980, pp. 369-391.

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.