Aribi, Amine; El Soufi, Ahmad The first positive eigenvalue of the sub-Laplacian on CR spheres. (English) Zbl 1372.32044 Ann. Global Anal. Geom. 51, No. 1, 1-9 (2017). Reviewer: Yunus E. Zeytuncu (Dearborn) MSC: 32V20 PDFBibTeX XMLCite \textit{A. Aribi} and \textit{A. El Soufi}, Ann. Global Anal. Geom. 51, No. 1, 1--9 (2017; Zbl 1372.32044) Full Text: DOI arXiv
Aribi, Amine; Dragomir, Sorin; El Soufi, Ahmad A lower bound on the spectrum of the Sublaplacian. (English) Zbl 1322.53076 J. Geom. Anal. 25, No. 3, 1492-1519 (2015). MSC: 53C55 32V05 53C21 58J50 PDFBibTeX XMLCite \textit{A. Aribi} et al., J. Geom. Anal. 25, No. 3, 1492--1519 (2015; Zbl 1322.53076) Full Text: DOI
Aribi, Amine; Dragomir, Sorin; El Soufi, Ahmad Eigenvalues of the sub-Laplacian and deformations of contact structures on a compact CR manifold. (English) Zbl 1320.32042 Differ. Geom. Appl. 39, 113-128 (2015). MSC: 32V20 PDFBibTeX XMLCite \textit{A. Aribi} et al., Differ. Geom. Appl. 39, 113--128 (2015; Zbl 1320.32042) Full Text: DOI
Aribi, Amine; Dragomir, Sorin; El Soufi, Ahmad On the continuity of the eigenvalues of a sublaplacian. (English) Zbl 1286.32018 Can. Math. Bull. 57, No. 1, 12-24 (2014). MSC: 32V20 53C56 PDFBibTeX XMLCite \textit{A. Aribi} et al., Can. Math. Bull. 57, No. 1, 12--24 (2014; Zbl 1286.32018) Full Text: DOI
Aribi, Amine; El Soufi, Ahmad Inequalities and bounds for the eigenvalues of the sub-Laplacian on a strictly pseudoconvex CR manifold. (English) Zbl 1269.32021 Calc. Var. Partial Differ. Equ. 47, No. 3-4, 437-463 (2013). MSC: 32V20 35H20 58J50 PDFBibTeX XMLCite \textit{A. Aribi} and \textit{A. El Soufi}, Calc. Var. Partial Differ. Equ. 47, No. 3--4, 437--463 (2013; Zbl 1269.32021) Full Text: DOI arXiv