Li, Liulan; Ponnusamy, Saminathan; Wirths, Karl-Joachim An elementary counterexample to a coefficient conjecture. (English) Zbl 07823318 Comput. Methods Funct. Theory 24, No. 1, 229-239 (2024). MSC: 30D30 30C45 30C50 PDFBibTeX XMLCite \textit{L. Li} et al., Comput. Methods Funct. Theory 24, No. 1, 229--239 (2024; Zbl 07823318) Full Text: DOI arXiv
Li, Liulan; Ponnusamy, Saminathan; Wirths, Karl Joachim Relations of the class \(\mathcal{U}(\lambda )\) to other families of functions. (English) Zbl 1492.30041 Bull. Malays. Math. Sci. Soc. (2) 45, No. 3, 955-972 (2022). MSC: 30C45 31A05 PDFBibTeX XMLCite \textit{L. Li} et al., Bull. Malays. Math. Sci. Soc. (2) 45, No. 3, 955--972 (2022; Zbl 1492.30041) Full Text: DOI arXiv
Ponnusamy, Saminathan; Sharma, Navneet Lal; Wirths, Karl-Joachim Logarithmic coefficients problems in families related to starlike and convex functions. (English) Zbl 1440.30004 J. Aust. Math. Soc. 109, No. 2, 230-249 (2020). MSC: 30C45 30C20 30C50 30C55 PDFBibTeX XMLCite \textit{S. Ponnusamy} et al., J. Aust. Math. Soc. 109, No. 2, 230--249 (2020; Zbl 1440.30004) Full Text: DOI arXiv
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
Ponnusamy, Saminathan; Vijayakumar, Ramakrishnan; Wirths, Karl-Joachim Refinement of the Classical Bohr Inequality. arXiv:1911.05315 Preprint, arXiv:1911.05315 [math.CV] (2019). MSC: 30A10 30B10 30C45 30C55 41A58 BibTeX Cite \textit{S. Ponnusamy} et al., ``Refinement of the Classical Bohr Inequality'', Preprint, arXiv:1911.05315 [math.CV] (2019) Full Text: arXiv OA License
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
Ponnusamy, Saminathan; Sharma, Navneet Lal; Wirths, Karl-Joachim Logarithmic coefficients of the inverse of univalent functions. (English) Zbl 1404.30023 Result. Math. 73, No. 4, Paper No. 160, 20 p. (2018). MSC: 30C45 PDFBibTeX XMLCite \textit{S. Ponnusamy} et al., Result. Math. 73, No. 4, Paper No. 160, 20 p. (2018; Zbl 1404.30023) Full Text: DOI arXiv
Obradović, Milutin; Ponnusamy, Saminathan; Wirths, Karl-Joachim Erratum to: “Logarithmic coefficients and a coefficient conjecture for univalent functions”. (English) Zbl 1408.30017 Monatsh. Math. 185, No. 3, 503-506 (2018). MSC: 30C45 PDFBibTeX XMLCite \textit{M. Obradović} et al., Monatsh. Math. 185, No. 3, 503--506 (2018; Zbl 1408.30017) Full Text: DOI
Obradović, Milutin; Ponnusamy, Saminathan; Wirths, Karl-Joachim Logarithmic coefficients and a coefficient conjecture for univalent functions. (English) Zbl 1400.30027 Monatsh. Math. 185, No. 3, 489-501 (2018); erratum ibid. 185, No. 3, 503-506 (2018). Reviewer: Janusz Sokol (Rzeszow) MSC: 30C45 PDFBibTeX XMLCite \textit{M. Obradović} et al., Monatsh. Math. 185, No. 3, 489--501 (2018; Zbl 1400.30027) Full Text: DOI arXiv
Obradović, Milutin; Ponnusamy, Saminathan; Wirths, Karl-Joachim On relations between the classes \(\mathcal {S}\) and \(\mathcal {U}\). (English) Zbl 1362.30017 J. Anal. 24, No. 1, 83-93 (2016). MSC: 30C45 30C75 PDFBibTeX XMLCite \textit{M. Obradović} et al., J. Anal. 24, No. 1, 83--93 (2016; Zbl 1362.30017) Full Text: DOI arXiv
Obradović, Milutin; Ponnusamy, Saminathan; Wirths, Karl-Joachim Geometric studies on the class \(\mathcal U(\lambda)\). (English) Zbl 1348.30009 Bull. Malays. Math. Sci. Soc. (2) 39, No. 3, 1259-1284 (2016). MSC: 30C45 30C50 PDFBibTeX XMLCite \textit{M. Obradović} et al., Bull. Malays. Math. Sci. Soc. (2) 39, No. 3, 1259--1284 (2016; Zbl 1348.30009) Full Text: DOI arXiv
Bhowmik, Bappaditya; Wirths, Karl-Joachim Central functions for classes of concave univalent functions. (English) Zbl 1389.30034 Math. Slovaca 66, No. 1, 141-146 (2016). Reviewer: Janusz Sokol (Rzeszow) MSC: 30C45 PDFBibTeX XMLCite \textit{B. Bhowmik} and \textit{K.-J. Wirths}, Math. Slovaca 66, No. 1, 141--146 (2016; Zbl 1389.30034) Full Text: DOI
Obradović, Milutin; Ponnusamy, S.; Wirths, Karl-Joachim Integral means and Dirichlet integral for analytic functions. (English) Zbl 1309.30019 Math. Nachr. 288, No. 2-3, 334-342 (2015). MSC: 30C45 30E99 PDFBibTeX XMLCite \textit{M. Obradović} et al., Math. Nachr. 288, No. 2--3, 334--342 (2015; Zbl 1309.30019) Full Text: DOI
Obradović, Milutin; Ponnusamy, Saminathan; Wirths, Karl-Joachim Where is \(f (z) / f'(z)\) univalent? (English) Zbl 1336.30018 J. Anal. 22, 131-143 (2014). MSC: 30C45 PDFBibTeX XMLCite \textit{M. Obradović} et al., J. Anal. 22, 131--143 (2014; Zbl 1336.30018) Full Text: arXiv
Bhowmik, Bappaditya; Wirths, Karl-Joachim Inequalities for the coefficients of meromorphic starlike functions with nonzero pole. (English) Zbl 1303.30012 Result. Math. 65, No. 1-2, 1-8 (2014). MSC: 30C45 PDFBibTeX XMLCite \textit{B. Bhowmik} and \textit{K.-J. Wirths}, Result. Math. 65, No. 1--2, 1--8 (2014; Zbl 1303.30012) Full Text: DOI
Bhowmik, Bappaditya; Wirths, Karl-Joachim Coefficient discs and generalized central functions for the class of concave schlicht functions. (English) Zbl 1301.30012 Bull. Korean Math. Soc. 51, No. 5, 1551-1559 (2014). Reviewer: V. Ravichandran (Delhi) MSC: 30C45 30C50 PDFBibTeX XMLCite \textit{B. Bhowmik} and \textit{K.-J. Wirths}, Bull. Korean Math. Soc. 51, No. 5, 1551--1559 (2014; Zbl 1301.30012) Full Text: DOI Link
Ponnusamy, Saminathan; Wirths, Karl-Joachim On the problem of Gromova and Vasil’ev on integral means, and Yamashita’s conjecture for spirallike functions. (English) Zbl 1295.30042 Ann. Acad. Sci. Fenn., Math. 39, No. 2, 721-731 (2014). MSC: 30C45 PDFBibTeX XMLCite \textit{S. Ponnusamy} and \textit{K.-J. Wirths}, Ann. Acad. Sci. Fenn., Math. 39, No. 2, 721--731 (2014; Zbl 1295.30042) Full Text: DOI
Obradović, Milutin; Ponnusamy, Saminathan; Wirths, Karl-Joachim A proof of Yamashita’s conjecture on area integral. (English) Zbl 1283.30031 Comput. Methods Funct. Theory 13, No. 3, 479-492 (2013). Reviewer: Jan Stankiewicz (Rzeszów) MSC: 30C45 30C50 PDFBibTeX XMLCite \textit{M. Obradović} et al., Comput. Methods Funct. Theory 13, No. 3, 479--492 (2013; Zbl 1283.30031) Full Text: DOI
Obradović, Milutin; Ponnusamy, Saminathan; Wirths, Karl-Joachim Coefficient characterizations and sections for some univalent functions. (English. Russian original) Zbl 1283.30047 Sib. Math. J. 54, No. 4, 679-696 (2013); translation from Sib. Mat. Zh. 54, No. 4, 852-870 (2013). MSC: 30C50 30C45 PDFBibTeX XMLCite \textit{M. Obradović} et al., Sib. Math. J. 54, No. 4, 679--696 (2013; Zbl 1283.30047); translation from Sib. Mat. Zh. 54, No. 4, 852--870 (2013) Full Text: DOI
Avkhadiev, F. G.; Wirths, K.-J. Starlike cases of the generalized Goodman conjecture. (English) Zbl 1279.30010 Lobachevskii J. Math. 34, No. 2, 142-147 (2013). MSC: 30C45 PDFBibTeX XMLCite \textit{F. G. Avkhadiev} and \textit{K. J. Wirths}, Lobachevskii J. Math. 34, No. 2, 142--147 (2013; Zbl 1279.30010) Full Text: DOI
Bhowmik, Bappaditya; Wirths, Karl-Joachim A sharp bound for the Schwarzian derivative of concave functions. (English) Zbl 1267.30035 Colloq. Math. 128, No. 2, 245-251 (2012). Reviewer: Yuming Chu (Zhejiang) MSC: 30C45 30C55 30C62 PDFBibTeX XMLCite \textit{B. Bhowmik} and \textit{K.-J. Wirths}, Colloq. Math. 128, No. 2, 245--251 (2012; Zbl 1267.30035) Full Text: DOI Link
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. On the coefficients of quasiconformality for convex functions. (English) Zbl 1252.30016 Lobachevskii J. Math. 31, No. 4, 323-325 (2010). MSC: 30C62 30C45 PDFBibTeX XMLCite \textit{F. G. Avkhadiev} and \textit{K. J. Wirths}, Lobachevskii J. Math. 31, No. 4, 323--325 (2010; Zbl 1252.30016) Full Text: DOI
Bhowmik, B.; Ponnusamy, S.; Wirths, K.-J. On some problems of James Miller. (English) Zbl 1218.30019 Cubo 12, No. 1, 15-21 (2010). MSC: 30C45 PDFBibTeX XMLCite \textit{B. Bhowmik} et al., Cubo 12, No. 1, 15--21 (2010; Zbl 1218.30019) Full Text: DOI arXiv
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
Bhowmik, Bappaditya; Ponnusamy, Saminathan; Wirths, Karl-Joachim Concave functions, Blaschke products, and polygonal mappings. (Russian, English) Zbl 1224.30035 Sib. Mat. Zh. 50, No. 4, 772-779 (2009); translation in Sib. Math. J. 50, No. 4, 609-615 (2009). MSC: 30C45 30J10 PDFBibTeX XMLCite \textit{B. Bhowmik} et al., Sib. Mat. Zh. 50, No. 4, 772--779 (2009; Zbl 1224.30035); translation in Sib. Math. J. 50, No. 4, 609--615 (2009) Full Text: EuDML EMIS
Bhowmik, B.; Ponnusamy, S.; Wirths, K.-J. Coefficient estimates and the convex hull problem for meromorphic functions. (English) Zbl 1199.30051 Mathematica 51(74), No. 1, 31-38 (2009). MSC: 30C45 PDFBibTeX XMLCite \textit{B. Bhowmik} et al., Mathematica 51(74), No. 1, 31--38 (2009; Zbl 1199.30051)
Avkhadiev, Farit G.; Wirths, Karl-Joachim Schwarz-Pick type inequalities. (English) Zbl 1168.30001 Frontiers in Mathematics. Basel: Birkhäuser (ISBN 978-3-7643-9999-3/pbk; 978-3-0346-0000-2/ebook). viii, 156 p. (2009). Reviewer: Vasily A. Chernecky (Odessa) MSC: 30-02 30C20 30C50 30C55 30C80 30D50 30F45 51M10 30A10 PDFBibTeX XMLCite \textit{F. G. Avkhadiev} and \textit{K.-J. Wirths}, Schwarz-Pick type inequalities. Basel: Birkhäuser (2009; Zbl 1168.30001) Full Text: DOI
Bhowmik, B.; Ponnusamy, S.; Wirths, K.-J. Unbounded convex polygons, Blaschke products and concave schlicht functions. (English) Zbl 1161.30006 Indian J. Math. 50, No. 2, 339-349 (2008). MSC: 30C45 PDFBibTeX XMLCite \textit{B. Bhowmik} et al., Indian J. Math. 50, No. 2, 339--349 (2008; Zbl 1161.30006)
Avkhadiev, Farit G.; Wirths, Karl-Joachim Estimates of the derivatives of meromorphic maps from convex domains into concave domains. (English) Zbl 1155.30003 Comput. Methods Funct. Theory 8, No. 1, 107-119 (2008). Reviewer: J. D. Mackenzie MSC: 30C20 30C80 30C55 PDFBibTeX XMLCite \textit{F. G. Avkhadiev} and \textit{K.-J. Wirths}, Comput. Methods Funct. Theory 8, No. 1, 107--119 (2008; Zbl 1155.30003) Full Text: DOI
Avkhadiev, Farit G.; Wirths, Karl-Joachim The punishing factors for convex pairs are \(2^{n-1}\). (English) Zbl 1147.30014 Rev. Mat. Iberoam. 23, No. 3, 847-860 (2007). Reviewer: Nikola Tuneski (Skopje) MSC: 30C50 30C45 30D50 PDFBibTeX XMLCite \textit{F. G. Avkhadiev} and \textit{K.-J. Wirths}, Rev. Mat. Iberoam. 23, No. 3, 847--860 (2007; Zbl 1147.30014) Full Text: DOI Euclid EuDML
Bhowmik, Bappaditya; Ponnusamy, Saminathan; Wirths, Karl-Joachim Domains of variability of Laurent coefficients and the convex hull for the family of concave univalent functions. (English) Zbl 1148.30006 Kodai Math. J. 30, No. 3, 385-393 (2007). Reviewer: Dorin Blezu (Sibiu) MSC: 30C45 PDFBibTeX XMLCite \textit{B. Bhowmik} et al., Kodai Math. J. 30, No. 3, 385--393 (2007; Zbl 1148.30006) Full Text: DOI arXiv
Avkhadiev, Farit G.; Wirths, Karl-Joachim Sharp bounds for sums of coefficients of inverses of convex functions. (English) Zbl 1147.30013 Comput. Methods Funct. Theory 7, No. 1, 105-109 (2007). Reviewer: Nikola Tuneski (Skopje) MSC: 30C50 30C45 30D50 PDFBibTeX XMLCite \textit{F. G. Avkhadiev} and \textit{K.-J. Wirths}, Comput. Methods Funct. Theory 7, No. 1, 105--109 (2007; Zbl 1147.30013) Full Text: DOI
Avkhadiev, F. G.; Wirths, K.-J. Unified Poincaré and Hardy inequalities with sharp constants for convex domains. (English) Zbl 1145.26005 ZAMM, Z. Angew. Math. Mech. 87, No. 8-9, 632-642 (2007). Reviewer: László Leindler (Szeged) MSC: 26D15 PDFBibTeX XMLCite \textit{F. G. Avkhadiev} and \textit{K. J. Wirths}, ZAMM, Z. Angew. Math. Mech. 87, No. 8--9, 632--642 (2007; Zbl 1145.26005) Full Text: DOI
Avkhadiev, F. G.; Wirths, K.-J. Subordination under concave univalent functions. (English) Zbl 1129.30004 Complex Var. Elliptic Equ. 52, No. 4, 299-305 (2007). Reviewer: Eugen Drăghici (Sibiu) MSC: 30C45 PDFBibTeX XMLCite \textit{F. G. Avkhadiev} and \textit{K. J. Wirths}, Complex Var. Elliptic Equ. 52, No. 4, 299--305 (2007; Zbl 1129.30004) Full Text: DOI
Avkhadiev, Farit G.; Wirths, Karl-Joachim A proof of the Livingston conjecture. (English) Zbl 1109.30021 Forum Math. 19, No. 1, 149-157 (2007). MSC: 30C50 30C45 PDFBibTeX XMLCite \textit{F. G. Avkhadiev} and \textit{K.-J. Wirths}, Forum Math. 19, No. 1, 149--157 (2007; Zbl 1109.30021) Full Text: DOI
Wirths, K.-J. On the residuum of concave univalent functions. (English) Zbl 1164.30355 Serdica Math. J. 32, No. 2-3, 209-214 (2006). Reviewer: Dmitri V. Prokhorov (Saratov) MSC: 30C45 30C25 PDFBibTeX XMLCite \textit{K. J. Wirths}, Serdica Math. J. 32, No. 2--3, 209--214 (2006; Zbl 1164.30355)
Avkhadiev, F. G.; Pommerenke, Ch.; Wirths, K.-J. Sharp inequalities for the coefficients of concave schlicht functions. (English) Zbl 1210.30005 Comment. Math. Helv. 81, No. 4, 801-807 (2006). MSC: 30C50 30C45 PDFBibTeX XMLCite \textit{F. G. Avkhadiev} et al., Comment. Math. Helv. 81, No. 4, 801--807 (2006; Zbl 1210.30005) Full Text: DOI
Wirths, Karl-Joachim Julia’s lemma and concave schlicht functions. (English) Zbl 1074.30013 Quaest. Math. 28, No. 1, 95-103 (2005). Reviewer: Maslina Darus (Selangor) MSC: 30C45 30D50 PDFBibTeX XMLCite \textit{K.-J. Wirths}, Quaest. Math. 28, No. 1, 95--103 (2005; Zbl 1074.30013) Full Text: DOI
Avkhadiev, F. G.; Wirths, K.-J. Concave schlicht functions with bounded opening angle at infinity. (English) Zbl 1071.30005 Lobachevskii J. Math. 17, 3-10 (2005). Reviewer: Zbigniew J. Jakubowski (Łódź) MSC: 30C45 30C50 PDFBibTeX XMLCite \textit{F. G. Avkhadiev} and \textit{K. J. Wirths}, Lobachevskii J. Math. 17, 3--10 (2005; Zbl 1071.30005) Full Text: EuDML EMIS
Avkhadiev, F. G.; Wirths, K.-J. The conformal radius as a function and its gradient image. (English) Zbl 1096.30013 Isr. J. Math. 145, 349-374 (2005). Reviewer: Abdelkrim Brania (Atlanta) MSC: 30C62 30C55 30C45 PDFBibTeX XMLCite \textit{F. G. Avkhadiev} and \textit{K. J. Wirths}, Isr. J. Math. 145, 349--374 (2005; Zbl 1096.30013) Full Text: DOI
Avkhadiev, Farit G.; Wirths, Karl J. On a conjecture of Livingston. (English) Zbl 1092.30015 Mathematica 46(69), No. 1, 19-23 (2004). Reviewer: Dorin Blezu (Sibiu) MSC: 30C45 30C50 PDFBibTeX XMLCite \textit{F. G. Avkhadiev} and \textit{K. J. Wirths}, Mathematica 46(69), No. 1, 19--23 (2004; Zbl 1092.30015)
Wirths, Karl-Joachim A proof of the Livingston conjecture for the fourth and the fifth coefficient of concave univalent functions. (English) Zbl 1058.30018 Ann. Pol. Math. 83, No. 1, 87-93 (2004). Reviewer: James A. Hummel (College Park) MSC: 30C45 30C50 PDFBibTeX XMLCite \textit{K.-J. Wirths}, Ann. Pol. Math. 83, No. 1, 87--93 (2004; Zbl 1058.30018) Full Text: DOI
Avkhadiev, Farit G.; Pommerenke, Christian; Wirths, Karl-Joachim On the coefficients of concave univalent functions. (English) Zbl 1149.30013 Math. Nachr. 271, 3-9 (2004). Reviewer: Reiner Kühnau (Halle) MSC: 30C45 30C50 30C75 30C80 PDFBibTeX XMLCite \textit{F. G. Avkhadiev} et al., Math. Nachr. 271, 3--9 (2004; Zbl 1149.30013) Full Text: DOI
Avkhadiev, F. G.; Wirths, K.-J. Schwarz-Pick inequalities for derivatives of arbitrary order. (English) Zbl 1018.30018 Constructive Approximation 19, No. 2, 265-277 (2003). Reviewer: Dimitrios Betsakos (Greece) MSC: 30C80 30C55 PDFBibTeX XMLCite \textit{F. G. Avkhadiev} and \textit{K. J. Wirths}, Constr. Approx. 19, No. 2, 265--277 (2003; Zbl 1018.30018) Full Text: DOI
Avkhadiev, F. G.; Wirths, K.-J. Convex holes produce lower bounds for coefficients. (English) Zbl 1028.30010 Complex Variables, Theory Appl. 47, No. 7, 553-563 (2002). Reviewer: Frederick W.Hartmann (Villanova) MSC: 30C45 30C55 PDFBibTeX XMLCite \textit{F. G. Avkhadiev} and \textit{K. J. Wirths}, Complex Variables, Theory Appl. 47, No. 7, 553--563 (2002; Zbl 1028.30010) Full Text: DOI
Wirths, Karl-Joachim A note on Re(f(z)/z) for univalent functions. (English) Zbl 0701.30013 J. Indian Math. Soc., New Ser. 54, No. 1-4, 121-123 (1989). Reviewer: Z.J.Jakubowski MSC: 30C45 PDFBibTeX XMLCite \textit{K.-J. Wirths}, J. Indian Math. Soc., New Ser. 54, No. 1--4, 121--123 (1989; Zbl 0701.30013)
Wirths, K.-J. Coefficient bounds for convex functions of bounded type. (English) Zbl 0655.30014 Proc. Am. Math. Soc. 103, No. 2, 525-530 (1988). Reviewer: M.Kracht MSC: 30C50 30C45 PDFBibTeX XMLCite \textit{K. J. Wirths}, Proc. Am. Math. Soc. 103, No. 2, 525--530 (1988; Zbl 0655.30014) Full Text: DOI
Wirths, K.-J. On a method to deal with convex functions of bounded type. (English) Zbl 0698.30012 Ann. Univ. Mariae Curie-Skłodowska, Sect. A 41, 153-158 (1987). Reviewer: Z.J.Jakubowski MSC: 30C45 PDFBibTeX XMLCite \textit{K. J. Wirths}, Ann. Univ. Mariae Curie-Skłodowska, Sect. A 41, 153--158 (1987; Zbl 0698.30012)
Ruscheweyh, Stephan; Singh, Vikramatidya; Wirths, Karl-Joachim On a boundary-value problem for convex univalent functions. (English) Zbl 0615.30010 J. Lond. Math. Soc., II. Ser. 34, 425-434 (1986). Reviewer: R.Heersink MSC: 30C45 PDFBibTeX XMLCite \textit{S. Ruscheweyh} et al., J. Lond. Math. Soc., II. Ser. 34, 425--434 (1986; Zbl 0615.30010) Full Text: DOI
Ruscheweyh, St.; Wirths, K.-J. On a radius of convexity problem with application to the Peschl-Bauer equation. (English) Zbl 0572.30012 Complex Variables, Theory Appl. 4, 173-179 (1985). Reviewer: M.Kracht MSC: 30C45 30G20 PDFBibTeX XMLCite \textit{St. Ruscheweyh} and \textit{K. J. Wirths}, Complex Variables, Theory Appl. 4, 173--179 (1985; Zbl 0572.30012) Full Text: DOI
Ruscheweyh, Stephan; Wirths, Karl-Joachim On extreme Bloch functions with prescribed critical points. (English) Zbl 0482.30023 Math. Z. 180, 91-105 (1982). MSC: 30D45 30C45 30F10 PDFBibTeX XMLCite \textit{S. Ruscheweyh} and \textit{K.-J. Wirths}, Math. Z. 180, 91--105 (1982; Zbl 0482.30023) Full Text: DOI EuDML
Asim, Mohammed Hakim; Wirths, Karl Joachim Koeffizientenabschätzungen für typisch-reelle Funktionen. (German) Zbl 0467.30014 Ann. Univ. Mariae Curie-Skłodowska, Sect. A 33, 1-12 (1979). MSC: 30C50 30C45 PDFBibTeX XMLCite \textit{M. H. Asim} and \textit{K. J. Wirths}, Ann. Univ. Mariae Curie-Skłodowska, Sect. A 33, 1--12 (1979; Zbl 0467.30014)
Ruscheweyh, St.; Wirths, K.-J. Convex sums of convex univalent functions. (English) Zbl 0369.30005 Indian J. Pure Appl. Math. 7, 49-52 (1976). MSC: 30C45 PDFBibTeX XMLCite \textit{St. Ruscheweyh} and \textit{K. J. Wirths}, Indian J. Pure Appl. Math. 7, 49--52 (1976; Zbl 0369.30005)
Ruscheweyh, St.; Wirths, K.-J. Riemann’s mapping theorem for n-analytic functions. (English) Zbl 0343.30007 Math. Z. 149, 287-297 (1976). MSC: 30C35 30C45 PDFBibTeX XMLCite \textit{St. Ruscheweyh} and \textit{K. J. Wirths}, Math. Z. 149, 287--297 (1976; Zbl 0343.30007) Full Text: DOI EuDML
Wirths, K.-J. Bemerkungen zu einem Satz von Fejer. (German) Zbl 0321.30006 Analysis Math. 1, 313-318 (1975). MSC: 30C45 PDFBibTeX XMLCite \textit{K. J. Wirths}, Anal. Math. 1, 313--318 (1975; Zbl 0321.30006) Full Text: DOI
Wirths, Karl-Joachim Über Potenzreihen mit monotonen Koeffizientenfolgen. (German) Zbl 0317.30009 Math. Nachr. 66, 43-55 (1975). MSC: 30C45 30B10 30C50 PDFBibTeX XMLCite \textit{K.-J. Wirths}, Math. Nachr. 66, 43--55 (1975; Zbl 0317.30009) Full Text: DOI
Wirths, Karl-Joachim Über totalmonotone Zahlenfolgen. (German) Zbl 0313.30009 Arch. Math. 26, 508-517 (1975). MSC: 30C45 30C75 PDFBibTeX XMLCite \textit{K.-J. Wirths}, Arch. Math. 26, 508--517 (1975; Zbl 0313.30009) Full Text: DOI
Ruscheweyh, St.; Wirths, K.-J. Über die Koeffizienten spezieller schlichter Polynome. (German) Zbl 0244.30013 Ann. Pol. Math. 28, 341-355 (1973). MSC: 30C50 30C45 PDFBibTeX XMLCite \textit{St. Ruscheweyh} and \textit{K. J. Wirths}, Ann. Pol. Math. 28, 341--355 (1973; Zbl 0244.30013) Full Text: DOI
Ruscheweyh, Stephan; Wirths, Karl-Joachim Über die Faltung schlichter Funktionen. II. (On the convolution of schlicht functions. II). (German) Zbl 0235.30009 Math. Z. 131, 11-23 (1973). MSC: 30C45 PDFBibTeX XMLCite \textit{S. Ruscheweyh} and \textit{K.-J. Wirths}, Math. Z. 131, 11--23 (1973; Zbl 0235.30009) Full Text: DOI EuDML