Marian, Daniela Some types of convex functions on networks. (English) Zbl 1212.90305 Rev. Anal. Numér. Théor. Approx. 38, No. 1, 55-67 (2009). MSC: 90C25 05C35 PDFBibTeX XMLCite \textit{D. Marian}, Rev. Anal. Numér. Théor. Approx. 38, No. 1, 55--67 (2009; Zbl 1212.90305)
An, Phan Thanh Helly-type theorems for roughly convex-like sets. (English) Zbl 1122.52005 Numer. Funct. Anal. Optimization 28, No. 5-6, 553-558 (2007). Reviewer: Juan-Enrique Martínez-Legaz (Barcelona) MSC: 52A35 52A01 PDFBibTeX XMLCite \textit{P. T. An}, Numer. Funct. Anal. Optim. 28, No. 5--6, 553--558 (2007; Zbl 1122.52005) Full Text: DOI
Phu, H. X. Strictly and roughly convexlike functions. (English) Zbl 1176.90470 J. Optim. Theory Appl. 117, No. 1, 139-156 (2003). MSC: 90C26 90C31 PDFBibTeX XMLCite \textit{H. X. Phu}, J. Optim. Theory Appl. 117, No. 1, 139--156 (2003; Zbl 1176.90470)
Hoang Xuan Phu; Tran Van Truong Invariant property of roughly contractive mappings. (English) Zbl 0977.47048 Vietnam J. Math. 28, No. 3, 275-290 (2000). Reviewer: A.Petrusel (Cluj-Napoca) MSC: 47H10 47H09 PDFBibTeX XMLCite \textit{Hoang Xuan Phu} and \textit{Tran Van Truong}, Vietnam J. Math. 28, No. 3, 275--290 (2000; Zbl 0977.47048)
Phu, H. X. Six kinds of roughly convex functions. (English) Zbl 0886.90178 J. Optimization Theory Appl. 92, No. 2, 357-375 (1997). MSC: 90C48 49J52 26B25 PDFBibTeX XMLCite \textit{H. X. Phu}, J. Optim. Theory Appl. 92, No. 2, 357--375 (1997; Zbl 0886.90178) Full Text: DOI
Phu, H. X. Some properties of globally \(\delta\)-convex functions. (English) Zbl 0839.90092 Optimization 35, No. 1, 23-41 (1995). MSC: 90C25 26B25 PDFBibTeX XMLCite \textit{H. X. Phu}, Optimization 35, No. 1, 23--41 (1995; Zbl 0839.90092) Full Text: DOI