Pak, H. K. Vector fields and modified Ricci curvatures. (English) Zbl 1364.53039 Adv. Stud. Contemp. Math., Kyungshang 22, No. 1, 183-188 (2012). MSC: 53C20 53C24 PDFBibTeX XMLCite \textit{H. K. Pak}, Adv. Stud. Contemp. Math., Kyungshang 22, No. 1, 183--188 (2012; Zbl 1364.53039)
Pak, H. K. On vanishing theorems for geometric infinitesimal automorphisms on a closed Riemannian manifold. (English) Zbl 1225.53035 Adv. Stud. Contemp. Math., Kyungshang 21, No. 1, 115-118 (2011). MSC: 53C20 53C24 PDFBibTeX XMLCite \textit{H. K. Pak}, Adv. Stud. Contemp. Math., Kyungshang 21, No. 1, 115--118 (2011; Zbl 1225.53035)