Koo, Hyungwoon; Li, Song-Ying Local Hopf lemma for certain degenerate elliptic operators on the half-space. (English) Zbl 1518.35010 Complex Anal. Oper. Theory 17, No. 5, Paper No. 67, 19 p. (2023). MSC: 35A02 35B60 35J70 42B99 PDFBibTeX XMLCite \textit{H. Koo} and \textit{S.-Y. Li}, Complex Anal. Oper. Theory 17, No. 5, Paper No. 67, 19 p. (2023; Zbl 1518.35010) Full Text: DOI
Li, Song-Ying; Duong Ngoc Son; Wang, Xiaodong A new characterization of the CR sphere and the sharp eigenvalue estimate for the Kohn Laplacian. (English) Zbl 1319.53032 Adv. Math. 281, 1285-1305 (2015). MSC: 53C21 32V30 PDFBibTeX XMLCite \textit{S.-Y. Li} et al., Adv. Math. 281, 1285--1305 (2015; Zbl 1319.53032) Full Text: DOI arXiv
Li, Song-Ying; Tran, Myan On the CR-Obata theorem and some extremal problems associated to pseudoscalar curvature on the real ellipsoids in \(\mathbb{C}^{n+1}\). (English) Zbl 1228.32035 Trans. Am. Math. Soc. 363, No. 8, 4027-4042 (2011). Reviewer: Mauro Nacinovich (Roma) MSC: 32V05 32V20 53C56 PDFBibTeX XMLCite \textit{S.-Y. Li} and \textit{M. Tran}, Trans. Am. Math. Soc. 363, No. 8, 4027--4042 (2011; Zbl 1228.32035) Full Text: DOI
Li, Songying; Luk, Hing-Sun An explicit formula for the Webster torsion of a pseudo-Hermitian manifold and its application to torsion-free hypersurfaces. (English) Zbl 1125.32016 Sci. China, Ser. A 49, No. 11, 1662-1682 (2006). Reviewer: A. L. Onishchik (Yaroslavl) MSC: 32V15 32V20 PDFBibTeX XMLCite \textit{S. Li} and \textit{H.-S. Luk}, Sci. China, Ser. A 49, No. 11, 1662--1682 (2006; Zbl 1125.32016) Full Text: DOI
Li, Song-Ying; Luk, Hing-Sun The sharp lower bound for the first positive eigenvalue of a sub-Laplacian on a pseudo-Hermitian manifold. (English) Zbl 1041.32024 Proc. Am. Math. Soc. 132, No. 3, 789-798 (2004). Reviewer: Mauro Nacinovich (Roma) MSC: 32V05 32V20 53C56 PDFBibTeX XMLCite \textit{S.-Y. Li} and \textit{H.-S. Luk}, Proc. Am. Math. Soc. 132, No. 3, 789--798 (2004; Zbl 1041.32024) Full Text: DOI