Kayumov, I. R.; Wirths, Karl-Joachim Inequalities of Carlson type for \(\alpha\)-Bloch functions. (English) Zbl 1441.30049 Mediterr. J. Math. 17, No. 3, Paper No. 83, 9 p. (2020). MSC: 30D45 30C50 PDFBibTeX XMLCite \textit{I. R. Kayumov} and \textit{K.-J. Wirths}, Mediterr. J. Math. 17, No. 3, Paper No. 83, 9 p. (2020; Zbl 1441.30049) Full Text: DOI
Lee, See Keong; Ponnusamy, Saminathan; Wirths, Karl-Joachim On classes of meromorphic locally univalent functions defined by differential inequalities. (English) Zbl 1439.30029 Bull. Iran. Math. Soc. 46, No. 1, 149-158 (2020). Reviewer: Agnieszka Wisniowska-Wajnryb (Rzeszów) MSC: 30C45 PDFBibTeX XMLCite \textit{S. K. Lee} et al., Bull. Iran. Math. Soc. 46, No. 1, 149--158 (2020; Zbl 1439.30029) Full Text: DOI arXiv
Kayumov, I. R.; Wirths, K.-J. Coefficient inequalities for Bloch functions. (English) Zbl 1433.30060 Lobachevskii J. Math. 40, No. 9, 1319-1323 (2019). MSC: 30C50 30B10 PDFBibTeX XMLCite \textit{I. R. Kayumov} and \textit{K. J. Wirths}, Lobachevskii J. Math. 40, No. 9, 1319--1323 (2019; Zbl 1433.30060) Full Text: DOI
Kayumov, I. R.; Wirths, K.-J. Coefficients problems for Bloch functions. (English) Zbl 1430.30017 Anal. Math. Phys. 9, No. 3, 1069-1085 (2019). MSC: 30D45 30C80 30C50 30-02 PDFBibTeX XMLCite \textit{I. R. Kayumov} and \textit{K. J. Wirths}, Anal. Math. Phys. 9, No. 3, 1069--1085 (2019; Zbl 1430.30017) Full Text: DOI
Kayumov, I. R.; Wirths, K.-J. On the sum of squares of the coefficients of Bloch functions. (English) Zbl 1420.30015 Monatsh. Math. 190, No. 1, 123-135 (2019). MSC: 30H30 30B10 PDFBibTeX XMLCite \textit{I. R. Kayumov} and \textit{K. J. Wirths}, Monatsh. Math. 190, No. 1, 123--135 (2019; Zbl 1420.30015) Full Text: DOI arXiv
Ponnusamy, Saminathan; Wirths, Karl-Joachim Coefficient problems on the class \(U(\lambda)\). (English) Zbl 1427.30029 Probl. Anal. Issues Anal. 7(25), No. 1, 87-103 (2018). MSC: 30C45 30C50 30C55 PDFBibTeX XMLCite \textit{S. Ponnusamy} and \textit{K.-J. Wirths}, Probl. Anal. Issues Anal. 7(25), No. 1, 87--103 (2018; Zbl 1427.30029) Full Text: DOI arXiv MNR
Avkhadiev, F. G.; Wirths, K. J. On the best constants for the Brezis-Marcus inequalities in balls. (English) Zbl 1259.26025 J. Math. Anal. Appl. 396, No. 2, 473-480 (2012). Reviewer: László Tóth (Pécs) MSC: 26D15 PDFBibTeX XMLCite \textit{F. G. Avkhadiev} and \textit{K. J. Wirths}, J. Math. Anal. Appl. 396, No. 2, 473--480 (2012; Zbl 1259.26025) Full Text: DOI
Ponnusamy, S.; Wirths, K.-J. On an extreme point conjecture for concave functions. (English) Zbl 1272.30027 Russ. Math. 55, No. 12, 44-47 (2011). Reviewer: Eligiusz Złotkiewicz (Lublin) MSC: 30C45 30C35 PDFBibTeX XMLCite \textit{S. Ponnusamy} and \textit{K. J. Wirths}, Russ. Math. 55, No. 12, 44--47 (2011; Zbl 1272.30027) Full Text: DOI
Bhowmik, B.; Ponnusamy, S.; Wirths, K.-J. On the Fekete-Szegö problem for concave univalent functions. (English) Zbl 1202.30015 J. Math. Anal. Appl. 373, No. 2, 432-438 (2011). MSC: 30C45 PDFBibTeX XMLCite \textit{B. Bhowmik} et al., J. Math. Anal. Appl. 373, No. 2, 432--438 (2011; Zbl 1202.30015) Full Text: DOI arXiv
Avkhadiev, F. G.; Wirths, K.-J. Weighted Hardy inequalities with sharp constants. (English) Zbl 1254.26031 Lobachevskii J. Math. 31, No. 1, 1-7 (2010). MSC: 26D15 33C10 PDFBibTeX XMLCite \textit{F. G. Avkhadiev} and \textit{K. J. Wirths}, Lobachevskii J. Math. 31, No. 1, 1--7 (2010; Zbl 1254.26031) Full Text: DOI
Bhowmik, Bappaditya; Ponnusamy, Saminathan; Wirths, Karl-Joachim Characterization and the pre-Schwarzian norm estimate for concave univalent functions. (English) Zbl 1201.30008 Monatsh. Math. 161, No. 1, 59-75 (2010). MSC: 30C45 PDFBibTeX XMLCite \textit{B. Bhowmik} et al., Monatsh. Math. 161, No. 1, 59--75 (2010; Zbl 1201.30008) Full Text: DOI arXiv