Wang, Xinjing; Cui, Xuewei; Niu, Pengcheng A Liouville theorem for the semilinear fractional CR covariant equation on the Heisenberg group. (English) Zbl 1415.35071 Complex Var. Elliptic Equ. 64, No. 8, 1325-1344 (2019). MSC: 35B53 35A01 35J57 35R11 35R03 PDFBibTeX XMLCite \textit{X. Wang} et al., Complex Var. Elliptic Equ. 64, No. 8, 1325--1344 (2019; Zbl 1415.35071) Full Text: DOI
Niu, Pengcheng; Wu, Leyun; Ji, Xiaoxue Positive solutions to nonlinear systems involving fully nonlinear fractional operators. (English) Zbl 1439.35543 Fract. Calc. Appl. Anal. 21, No. 2, 552-574 (2018). MSC: 35R11 35B09 35A01 35B53 35J47 PDFBibTeX XMLCite \textit{P. Niu} et al., Fract. Calc. Appl. Anal. 21, No. 2, 552--574 (2018; Zbl 1439.35543) Full Text: DOI
Dou, Jingbo; Niu, Pengcheng; Han, Junqiang Polar coordinates for the generalized Baouendi-Grushin operator and applications. (English) Zbl 1164.35077 J. Partial Differ. Equations 20, No. 4, 322-336 (2007). MSC: 35R45 35J60 PDFBibTeX XMLCite \textit{J. Dou} et al., J. Partial Differ. Equations 20, No. 4, 322--336 (2007; Zbl 1164.35077)
Niu, Pengcheng; Dou, Jingbo Hardy-Sobolev type inequalities for generalized Baouendi-Grushin operators. (English) Zbl 1135.35321 Miskolc Math. Notes 8, No. 1, 73-87 (2007). MSC: 35H10 35R45 35J60 PDFBibTeX XMLCite \textit{P. Niu} and \textit{J. Dou}, Miskolc Math. Notes 8, No. 1, 73--87 (2007; Zbl 1135.35321)
Han, Junqian; Niu, Pengcheng Polar coordinates on \(H\)-type groups and applications. (English) Zbl 1119.35125 Vietnam J. Math. 34, No. 3, 307-316 (2006). MSC: 35R45 43A80 35J70 PDFBibTeX XMLCite \textit{J. Han} and \textit{P. Niu}, Vietnam J. Math. 34, No. 3, 307--316 (2006; Zbl 1119.35125)
Niu, Pengcheng; Dou, Jingbo; Zhang, Huiqing Nonexistence of weak solutions for the \(p\)-degenerate subelliptic inequalities constructed by generalized Baouendi-Grushin vector fields. (English) Zbl 1099.35184 Georgian Math. J. 12, No. 4, 727-742 (2005). Reviewer: Messoud A. Efendiev (Berlin) MSC: 35R45 35J60 PDFBibTeX XMLCite \textit{P. Niu} et al., Georgian Math. J. 12, No. 4, 727--742 (2005; Zbl 1099.35184)