Edit Profile (opens in new tab) Wirths, Karl-Joachim Co-Author Distance Author ID: wirths.karl-joachim Published as: Wirths, Karl-Joachim; Wirths, K.-J.; Wirths, K. J.; Wirths, Karl Joachim; Wirths, Karl J. more...less Homepage: https://www.tu-braunschweig.de/iaa/personal/wirths External Links: MGP Documents Indexed: 122 Publications since 1971, including 5 Books and 2 Additional arXiv Preprints 1 Further Contribution Reviewing Activity: 139 Reviews Biographic References: 1 Publication Co-Authors: 26 Co-Authors with 97 Joint Publications 694 Co-Co-Authors all top 5 Co-Authors 26 single-authored 29 Ponnusamy, Saminathan 28 Avkhadiev, Farit Gabidinovich 14 Ruscheweyh, Stephan 11 Bhowmik, Bappaditya 8 Obradović, Milutin 6 Kayumov, Il’giz Rifatovich 6 Xiao, Jie 3 Vijayakumar, Ramakrishnan 2 Bonk, Mario 2 Gräter, Joachim 2 Li, Liulan 2 Pommerenke, Christian 2 Roth, Oliver 2 Sharma, Navneet Lal 1 Asim, Mohammed Hakim 1 Balasubramanian, Ramachandran 1 Jank, Gerhard 1 Jarchow, Hans 1 Khammatova, Diana M. 1 Klouth, Richard 1 Lorenz, Dirk Alfred 1 Montesinos Santalucia, Vicente 1 Rivlin, Theodore Joseph 1 Schulte, Nils 1 Singh, Vikramaditya 1 Weigang, Peter all top 5 Serials 7 Lobachevskii Journal of Mathematics 7 Computational Methods and Function Theory 5 Monatshefte für Mathematik 5 Results in Mathematics 5 Complex Variables. Theory and Application 5 The Journal of Analysis 4 Journal of Mathematical Analysis and Applications 4 Archiv der Mathematik 4 Mathematische Nachrichten 4 Bulletin of the Belgian Mathematical Society - Simon Stevin 3 Annales Universitatis Mariae Curie-Skłodowska. Sectio A. Mathematica 3 Mathematische Zeitschrift 3 Proceedings of the American Mathematical Society 3 Bulletin of the Malaysian Mathematical Sciences Society. Second Series 3 Berichte der Gesellschaft für Mathematik und Datenverarbeitung, Bonn 2 Annales Polonici Mathematici 2 Constructive Approximation 2 Mathematica 2 Serdica Mathematical Journal 1 American Mathematical Monthly 1 Analysis Mathematica 1 Bulletin of the Australian Mathematical Society 1 IMA Journal of Numerical Analysis 1 Indian Journal of Pure & Applied Mathematics 1 Israel Journal of Mathematics 1 Mathematische Semesterberichte 1 Arkiv för Matematik 1 Bulletin of the London Mathematical Society 1 Canadian Mathematical Bulletin 1 Colloquium Mathematicum 1 Commentarii Mathematici Helvetici 1 Geometriae Dedicata 1 Indian Journal of Mathematics 1 Journal of Approximation Theory 1 The Journal of the Indian Mathematical Society. New Series 1 Journal of the London Mathematical Society. Second Series 1 Kodai Mathematical Journal 1 Mathematica Scandinavica 1 Mathematica Slovaca 1 Michigan Mathematical Journal 1 Proceedings of the Edinburgh Mathematical Society. Series II 1 Quaestiones Mathematicae 1 Siberian Mathematical Journal 1 Sibirskiĭ Matematicheskiĭ Zhurnal 1 Analysis 1 Bulletin of the Korean Mathematical Society 1 Bulletin of the Iranian Mathematical Society 1 Approximation Theory and its Applications 1 Revista Matemática Iberoamericana 1 Forum Mathematicum 1 Journal of Approximation Theory and its Applications 1 Russian Mathematics 1 Annales Academiae Scientiarum Fennicae. Mathematica 1 ZAMM. Zeitschrift für Angewandte Mathematik und Mechanik 1 Analysis (München) 1 Journal of the Australian Mathematical Society 1 Mediterranean Journal of Mathematics 1 Cubo 1 Complex Variables and Elliptic Equations 1 Bonner Mathematische Schriften 1 The College Mathematics Journal 1 Analysis and Mathematical Physics 1 Problemy Analiza. Issues of Analysis 1 Frontiers in Mathematics all top 5 Fields 109 Functions of a complex variable (30-XX) 5 Real functions (26-XX) 4 Sequences, series, summability (40-XX) 4 Functional analysis (46-XX) 3 Partial differential equations (35-XX) 3 Approximations and expansions (41-XX) 2 Potential theory (31-XX) 2 Several complex variables and analytic spaces (32-XX) 2 Operator theory (47-XX) 2 Numerical analysis (65-XX) 1 History and biography (01-XX) 1 Number theory (11-XX) 1 Linear and multilinear algebra; matrix theory (15-XX) 1 Special functions (33-XX) 1 Harmonic analysis on Euclidean spaces (42-XX) 1 Calculus of variations and optimal control; optimization (49-XX) 1 Geometry (51-XX) 1 Manifolds and cell complexes (57-XX) 1 Game theory, economics, finance, and other social and behavioral sciences (91-XX) 1 Mathematics education (97-XX) Publications by Year all cited Publications top 5 cited Publications Citations contained in zbMATH Open 88 Publications have been cited 737 times in 397 Documents Cited by ▼ Year ▼ Schwarz-Pick type inequalities. Zbl 1168.30001 Avkhadiev, Farit G.; Wirths, Karl-Joachim 59 2009 Unified Poincaré and Hardy inequalities with sharp constants for convex domains. Zbl 1145.26005 Avkhadiev, F. G.; Wirths, K.-J. 50 2007 Sharp Hardy-type inequalities with Lamb’s constant. Zbl 1237.26014 Avkhadiev, F. G.; Wirths, K.-J. 31 2011 On the Fekete-Szegö problem for concave univalent functions. Zbl 1202.30015 Bhowmik, B.; Ponnusamy, S.; Wirths, K.-J. 31 2011 New inequalities for the coefficients of unimodular bounded functions. Zbl 1442.30003 Ponnusamy, Saminathan; Vijayakumar, Ramakrishnan; Wirths, Karl-Joachim 29 2020 Geometric studies on the class \(\mathcal U(\lambda)\). Zbl 1348.30009 Obradović, Milutin; Ponnusamy, Saminathan; Wirths, Karl-Joachim 26 2016 Coefficient characterizations and sections for some univalent functions. Zbl 1283.30047 Obradović, Milutin; Ponnusamy, Saminathan; Wirths, Karl-Joachim 26 2013 Logarithmic coefficients and a coefficient conjecture for univalent functions. Zbl 1400.30027 Obradović, Milutin; Ponnusamy, Saminathan; Wirths, Karl-Joachim 25 2018 Sharp inequalities for the coefficients of concave schlicht functions. Zbl 1210.30005 Avkhadiev, F. G.; Pommerenke, Ch.; Wirths, K.-J. 23 2006 Weighted Hardy inequalities with sharp constants. Zbl 1254.26031 Avkhadiev, F. G.; Wirths, K.-J. 19 2010 A proof of the Livingston conjecture. Zbl 1109.30021 Avkhadiev, Farit G.; Wirths, Karl-Joachim 18 2007 Improved Bohr’s phenomenon in quasi-subordination classes. Zbl 1475.30005 Ponnusamy, Saminathan; Vijayakumar, Ramakrishnan; Wirths, Karl-Joachim 18 2022 Schwarz-Pick inequalities for derivatives of arbitrary order. Zbl 1018.30018 Avkhadiev, F. G.; Wirths, K.-J. 17 2003 Convex holes produce lower bounds for coefficients. Zbl 1028.30010 Avkhadiev, F. G.; Wirths, K.-J. 16 2002 Recognizing \(\mathfrak{Q}_{p,0}\) functions per Dirichlet space structure. Zbl 0989.30024 Wirths, K. J.; Xiao, J. 15 2001 On the coefficients of concave univalent functions. Zbl 1149.30013 Avkhadiev, Farit G.; Pommerenke, Christian; Wirths, Karl-Joachim 15 2004 Concave schlicht functions with bounded opening angle at infinity. Zbl 1071.30005 Avkhadiev, F. G.; Wirths, K.-J. 13 2005 On the problem of Gromova and Vasil’ev on integral means, and Yamashita’s conjecture for spirallike functions. Zbl 1295.30042 Ponnusamy, Saminathan; Wirths, Karl-Joachim 13 2014 Über totalmonotone Zahlenfolgen. Zbl 0313.30009 Wirths, Karl-Joachim 12 1975 A proof of Yamashita’s conjecture on area integral. Zbl 1283.30031 Obradović, Milutin; Ponnusamy, Saminathan; Wirths, Karl-Joachim 12 2013 On extreme Bloch functions with prescribed critical points. Zbl 0482.30023 Ruscheweyh, Stephan; Wirths, Karl-Joachim 11 1982 On the best constants for the Brezis-Marcus inequalities in balls. Zbl 1259.26025 Avkhadiev, F. G.; Wirths, K. J. 11 2012 An image-area inequality for some planar holomorphic maps. Zbl 0954.30017 Wirths, K. J.; Xiao, J. 11 2000 Über holomorphe Funktionen, die einer Wachstumsbeschränkung unterliegen. Zbl 0373.30016 Wirths, Karl-Joachim 11 1978 Bohr type inequalities for functions with a multiple zero at the origin. Zbl 1461.30004 Ponnusamy, S.; Wirths, K.-J. 10 2020 Logarithmic coefficients problems in families related to starlike and convex functions. Zbl 1440.30004 Ponnusamy, Saminathan; Sharma, Navneet Lal; Wirths, Karl-Joachim 10 2020 The conformal radius as a function and its gradient image. Zbl 1096.30013 Avkhadiev, F. G.; Wirths, K.-J. 9 2005 Logarithmic coefficients of the inverse of univalent functions. Zbl 1404.30023 Ponnusamy, Saminathan; Sharma, Navneet Lal; Wirths, Karl-Joachim 9 2018 Domains of variability of Laurent coefficients and the convex hull for the family of concave univalent functions. Zbl 1148.30006 Bhowmik, Bappaditya; Ponnusamy, Saminathan; Wirths, Karl-Joachim 8 2007 Schwarz-Pick inequalities for hyperbolic domains in the extended plane. Zbl 1066.30025 Avkhadiev, Farit G.; Wirths, Karl-Joachim 8 2004 Integral means and Dirichlet integral for analytic functions. Zbl 1309.30019 Obradović, Milutin; Ponnusamy, S.; Wirths, Karl-Joachim 8 2015 Coefficient problems on the class \(U(\lambda)\). Zbl 1427.30029 Ponnusamy, Saminathan; Wirths, Karl-Joachim 8 2018 Verallgemeinerungen eines Maximumprinzips. Zbl 0239.30013 Wirths, Karl-Joachim 7 1971 Global integral criteria for composition operators. Zbl 1015.30017 Wirths, K.-J.; Xiao, J. 7 2002 Coefficients problems for Bloch functions. Zbl 1430.30017 Kayumov, I. R.; Wirths, K.-J. 7 2019 Characterization and the pre-Schwarzian norm estimate for concave univalent functions. Zbl 1201.30008 Bhowmik, Bappaditya; Ponnusamy, Saminathan; Wirths, Karl-Joachim 7 2010 On the residuum of concave univalent functions. Zbl 1164.30355 Wirths, K.-J. 6 2006 Punishing factors for finitely connected domains. Zbl 1094.30026 Avkhadiev, F. G.; Wirths, K.-J. 5 2006 Normal families of gap power series. Zbl 0623.30044 Ruscheweyh, St.; Wirths, K.-J. 5 1986 Elementary considerations for classes of meromorphic univalent functions. Zbl 1401.30026 Ponnusamy, S.; Wirths, K.-J. 5 2018 Analogues to Landau’s inequality for nonvanishing bounded functions and for Bloch functions. Zbl 1421.30074 Kayumov, I. R.; Wirths, K.-J. 5 2019 Subordination under concave univalent functions. Zbl 1129.30004 Avkhadiev, F. G.; Wirths, K.-J. 4 2007 Concave functions, Blaschke products, and polygonal mappings. Zbl 1224.30035 Bhowmik, Bappaditya; Ponnusamy, Saminathan; Wirths, Karl-Joachim 4 2009 Extreme Bloch functions with many critical points. Zbl 0561.30023 Ruscheweyh, St.; Wirths, K. J. 4 1984 A proof of the Livingston conjecture for the fourth and the fifth coefficient of concave univalent functions. Zbl 1058.30018 Wirths, Karl-Joachim 4 2004 Where is \(f (z) / f'(z)\) univalent? Zbl 1336.30018 Obradović, Milutin; Ponnusamy, Saminathan; Wirths, Karl-Joachim 4 2014 On relations between the classes \(\mathcal {S}\) and \(\mathcal {U}\). Zbl 1362.30017 Obradović, Milutin; Ponnusamy, Saminathan; Wirths, Karl-Joachim 4 2016 Coefficient bounds for convex functions of bounded type. Zbl 0655.30014 Wirths, K.-J. 3 1988 On some problems of James Miller. Zbl 1218.30019 Bhowmik, B.; Ponnusamy, S.; Wirths, K.-J. 3 2010 Punishing factors for angles. Zbl 1072.30014 Avkhadiev, Farit G.; Wirths, Karl-Joachim 3 2003 Über die Faltung schlichter Funktionen. II. (On the convolution of schlicht functions. II). Zbl 0235.30009 Ruscheweyh, Stephan; Wirths, Karl-Joachim 3 1973 Über die Koeffizienten spezieller schlichter Polynome. Zbl 0244.30013 Ruscheweyh, St.; Wirths, K.-J. 3 1973 Unbounded convex polygons, Blaschke products and concave schlicht functions. Zbl 1161.30006 Bhowmik, B.; Ponnusamy, S.; Wirths, K.-J. 3 2008 On an extremal problem for bounded polynomials. Zbl 0602.41005 Ruscheweyh, Stephan; Wirths, Karl-Joachim 3 1985 Julia’s lemma and concave schlicht functions. Zbl 1074.30013 Wirths, Karl-Joachim 3 2005 Taylor coefficients of negative powers of schlicht functions. Zbl 1032.30017 Roth, Oliver; Wirths, Karl-Joachim 3 2001 On classes of meromorphic locally univalent functions defined by differential inequalities. Zbl 1439.30029 Lee, See Keong; Ponnusamy, Saminathan; Wirths, Karl-Joachim 3 2020 On the sum of squares of the coefficients of Bloch functions. Zbl 1420.30015 Kayumov, I. R.; Wirths, K.-J. 3 2019 A sharp bound for the Schwarzian derivative of concave functions. Zbl 1267.30035 Bhowmik, Bappaditya; Wirths, Karl-Joachim 3 2012 Duality for some large spaces of analytic functions. Zbl 1001.46014 Jarchow, H.; Montesinos, V.; Wirths, K. J.; Xiao, J. 2 2001 The Koebe domain for concave univalent functions. Zbl 1045.91009 Wirths, Karl-Joachim 2 2003 Poles near the origin produce lower bounds for coefficients of meromorphic univalent functions. Zbl 1061.30015 Avkhadiev, F. G.; Wirths, K.-J. 2 2004 A note on Re(f(z)/z) for univalent functions. Zbl 0701.30013 Wirths, Karl-Joachim 2 1989 Two new extremal properties of the Koebe-function. Zbl 0413.30017 Klouth, Richard; Wirths, K.-J. 2 1980 On an extremum problem for Bloch functions. Zbl 0786.30024 Wirths, Karl-Joachim 2 1993 Semi-dual functions and nonvanishing entire functions. Zbl 0797.30007 Wirths, K.-J. 2 1992 Sharp bounds for sums of coefficients of inverses of convex functions. Zbl 1147.30013 Avkhadiev, Farit G.; Wirths, Karl-Joachim 2 2007 Telescoping estimates for smooth series. Zbl 1309.26026 Wirths, Karl Joachim 2 2015 Estimates of the derivatives of meromorphic maps from convex domains into concave domains. Zbl 1155.30003 Avkhadiev, Farit G.; Wirths, Karl-Joachim 2 2008 Inequalities for the coefficients of meromorphic starlike functions with nonzero pole. Zbl 1303.30012 Bhowmik, Bappaditya; Wirths, Karl-Joachim 2 2014 Coefficient inequalities for Bloch functions. Zbl 1433.30060 Kayumov, I. R.; Wirths, K.-J. 2 2019 Punishing factors and Chua’s conjecture. Zbl 1129.30013 Avkhadiev, F. G.; Wirths, K.-J. 1 2007 The punishing factors for convex pairs are \(2^{n-1}\). Zbl 1147.30014 Avkhadiev, Farit G.; Wirths, Karl-Joachim 1 2007 On holomorphic functions satisfying \(| f(z)|(1 - | z|^ 2)\leq 1\) in the unit disc. Zbl 0484.30001 Wirths, Karl-Joachim 1 1982 Optimal recovery of the derivative of bounded analytic functions. Zbl 0519.30032 Rivlin, T. J.; Ruscheweyh, St.; Shaffer, D.; Wirths, K. J. 1 1983 Bounds for the Taylor coefficients of locally univalent Bloch functions. Zbl 1020.30036 Wirths, K.-J. 1 2000 Riemann’s mapping theorem for n-analytic functions. Zbl 0343.30007 Ruscheweyh, St.; Wirths, K.-J. 1 1976 Koeffizientenabschätzungen für typisch-reelle Funktionen. Zbl 0467.30014 Asim, Mohammed Hakim; Wirths, Karl Joachim 1 1979 A short proof of a theorem of Bertilsson by direct use of Loewner’s method. Zbl 1075.30501 Wirths, Karl-Joachim 1 2001 Bemerkungen zu einem Satz von Fejer. Zbl 0321.30006 Wirths, K.-J. 1 1975 On a boundary-value problem for convex univalent functions. Zbl 0615.30010 Ruscheweyh, Stephan; Singh, Vikramatidya; Wirths, Karl-Joachim 1 1986 Image areas of functions in the Dirichlet type spaces and their Möbius invariant subspaces. Zbl 0878.30027 Wirths, Karl J.; Xiao, Jie 1 1996 Convex sums of convex univalent functions. Zbl 0369.30005 Ruscheweyh, St.; Wirths, K.-J. 1 1976 On elementary bounds for \(\sum^{\infty}_{k=n}k^{-s}\). Zbl 1339.40003 Gräter, Joachim; Wirths, Karl-Joachim 1 2015 On Landau’s type estimates for coefficients of univalent functions. Zbl 1468.30039 Kayumov, I. R.; Khammatova, D. M.; Wirths, K.-J. 1 2020 Relations of the class \(\mathcal{U}(\lambda )\) to other families of functions. Zbl 1492.30041 Li, Liulan; Ponnusamy, Saminathan; Wirths, Karl Joachim 1 2022 Starlike cases of the generalized Goodman conjecture. Zbl 1279.30010 Avkhadiev, F. G.; Wirths, K.-J. 1 2013 Inequalities of Carlson type for \(\alpha\)-Bloch functions. Zbl 1441.30049 Kayumov, I. R.; Wirths, Karl-Joachim 1 2020 Improved Bohr’s phenomenon in quasi-subordination classes. Zbl 1475.30005 Ponnusamy, Saminathan; Vijayakumar, Ramakrishnan; Wirths, Karl-Joachim 18 2022 Relations of the class \(\mathcal{U}(\lambda )\) to other families of functions. Zbl 1492.30041 Li, Liulan; Ponnusamy, Saminathan; Wirths, Karl Joachim 1 2022 New inequalities for the coefficients of unimodular bounded functions. Zbl 1442.30003 Ponnusamy, Saminathan; Vijayakumar, Ramakrishnan; Wirths, Karl-Joachim 29 2020 Bohr type inequalities for functions with a multiple zero at the origin. Zbl 1461.30004 Ponnusamy, S.; Wirths, K.-J. 10 2020 Logarithmic coefficients problems in families related to starlike and convex functions. Zbl 1440.30004 Ponnusamy, Saminathan; Sharma, Navneet Lal; Wirths, Karl-Joachim 10 2020 On classes of meromorphic locally univalent functions defined by differential inequalities. Zbl 1439.30029 Lee, See Keong; Ponnusamy, Saminathan; Wirths, Karl-Joachim 3 2020 On Landau’s type estimates for coefficients of univalent functions. Zbl 1468.30039 Kayumov, I. R.; Khammatova, D. M.; Wirths, K.-J. 1 2020 Inequalities of Carlson type for \(\alpha\)-Bloch functions. Zbl 1441.30049 Kayumov, I. R.; Wirths, Karl-Joachim 1 2020 Coefficients problems for Bloch functions. Zbl 1430.30017 Kayumov, I. R.; Wirths, K.-J. 7 2019 Analogues to Landau’s inequality for nonvanishing bounded functions and for Bloch functions. Zbl 1421.30074 Kayumov, I. R.; Wirths, K.-J. 5 2019 On the sum of squares of the coefficients of Bloch functions. Zbl 1420.30015 Kayumov, I. R.; Wirths, K.-J. 3 2019 Coefficient inequalities for Bloch functions. Zbl 1433.30060 Kayumov, I. R.; Wirths, K.-J. 2 2019 Logarithmic coefficients and a coefficient conjecture for univalent functions. Zbl 1400.30027 Obradović, Milutin; Ponnusamy, Saminathan; Wirths, Karl-Joachim 25 2018 Logarithmic coefficients of the inverse of univalent functions. Zbl 1404.30023 Ponnusamy, Saminathan; Sharma, Navneet Lal; Wirths, Karl-Joachim 9 2018 Coefficient problems on the class \(U(\lambda)\). Zbl 1427.30029 Ponnusamy, Saminathan; Wirths, Karl-Joachim 8 2018 Elementary considerations for classes of meromorphic univalent functions. Zbl 1401.30026 Ponnusamy, S.; Wirths, K.-J. 5 2018 Geometric studies on the class \(\mathcal U(\lambda)\). Zbl 1348.30009 Obradović, Milutin; Ponnusamy, Saminathan; Wirths, Karl-Joachim 26 2016 On relations between the classes \(\mathcal {S}\) and \(\mathcal {U}\). Zbl 1362.30017 Obradović, Milutin; Ponnusamy, Saminathan; Wirths, Karl-Joachim 4 2016 Integral means and Dirichlet integral for analytic functions. Zbl 1309.30019 Obradović, Milutin; Ponnusamy, S.; Wirths, Karl-Joachim 8 2015 Telescoping estimates for smooth series. Zbl 1309.26026 Wirths, Karl Joachim 2 2015 On elementary bounds for \(\sum^{\infty}_{k=n}k^{-s}\). Zbl 1339.40003 Gräter, Joachim; Wirths, Karl-Joachim 1 2015 On the problem of Gromova and Vasil’ev on integral means, and Yamashita’s conjecture for spirallike functions. Zbl 1295.30042 Ponnusamy, Saminathan; Wirths, Karl-Joachim 13 2014 Where is \(f (z) / f'(z)\) univalent? Zbl 1336.30018 Obradović, Milutin; Ponnusamy, Saminathan; Wirths, Karl-Joachim 4 2014 Inequalities for the coefficients of meromorphic starlike functions with nonzero pole. Zbl 1303.30012 Bhowmik, Bappaditya; Wirths, Karl-Joachim 2 2014 Coefficient characterizations and sections for some univalent functions. Zbl 1283.30047 Obradović, Milutin; Ponnusamy, Saminathan; Wirths, Karl-Joachim 26 2013 A proof of Yamashita’s conjecture on area integral. Zbl 1283.30031 Obradović, Milutin; Ponnusamy, Saminathan; Wirths, Karl-Joachim 12 2013 Starlike cases of the generalized Goodman conjecture. Zbl 1279.30010 Avkhadiev, F. G.; Wirths, K.-J. 1 2013 On the best constants for the Brezis-Marcus inequalities in balls. Zbl 1259.26025 Avkhadiev, F. G.; Wirths, K. J. 11 2012 A sharp bound for the Schwarzian derivative of concave functions. Zbl 1267.30035 Bhowmik, Bappaditya; Wirths, Karl-Joachim 3 2012 Sharp Hardy-type inequalities with Lamb’s constant. Zbl 1237.26014 Avkhadiev, F. G.; Wirths, K.-J. 31 2011 On the Fekete-Szegö problem for concave univalent functions. Zbl 1202.30015 Bhowmik, B.; Ponnusamy, S.; Wirths, K.-J. 31 2011 Weighted Hardy inequalities with sharp constants. Zbl 1254.26031 Avkhadiev, F. G.; Wirths, K.-J. 19 2010 Characterization and the pre-Schwarzian norm estimate for concave univalent functions. Zbl 1201.30008 Bhowmik, Bappaditya; Ponnusamy, Saminathan; Wirths, Karl-Joachim 7 2010 On some problems of James Miller. Zbl 1218.30019 Bhowmik, B.; Ponnusamy, S.; Wirths, K.-J. 3 2010 Schwarz-Pick type inequalities. Zbl 1168.30001 Avkhadiev, Farit G.; Wirths, Karl-Joachim 59 2009 Concave functions, Blaschke products, and polygonal mappings. Zbl 1224.30035 Bhowmik, Bappaditya; Ponnusamy, Saminathan; Wirths, Karl-Joachim 4 2009 Unbounded convex polygons, Blaschke products and concave schlicht functions. Zbl 1161.30006 Bhowmik, B.; Ponnusamy, S.; Wirths, K.-J. 3 2008 Estimates of the derivatives of meromorphic maps from convex domains into concave domains. Zbl 1155.30003 Avkhadiev, Farit G.; Wirths, Karl-Joachim 2 2008 Unified Poincaré and Hardy inequalities with sharp constants for convex domains. Zbl 1145.26005 Avkhadiev, F. G.; Wirths, K.-J. 50 2007 A proof of the Livingston conjecture. Zbl 1109.30021 Avkhadiev, Farit G.; Wirths, Karl-Joachim 18 2007 Domains of variability of Laurent coefficients and the convex hull for the family of concave univalent functions. Zbl 1148.30006 Bhowmik, Bappaditya; Ponnusamy, Saminathan; Wirths, Karl-Joachim 8 2007 Subordination under concave univalent functions. Zbl 1129.30004 Avkhadiev, F. G.; Wirths, K.-J. 4 2007 Sharp bounds for sums of coefficients of inverses of convex functions. Zbl 1147.30013 Avkhadiev, Farit G.; Wirths, Karl-Joachim 2 2007 Punishing factors and Chua’s conjecture. Zbl 1129.30013 Avkhadiev, F. G.; Wirths, K.-J. 1 2007 The punishing factors for convex pairs are \(2^{n-1}\). Zbl 1147.30014 Avkhadiev, Farit G.; Wirths, Karl-Joachim 1 2007 Sharp inequalities for the coefficients of concave schlicht functions. Zbl 1210.30005 Avkhadiev, F. G.; Pommerenke, Ch.; Wirths, K.-J. 23 2006 On the residuum of concave univalent functions. Zbl 1164.30355 Wirths, K.-J. 6 2006 Punishing factors for finitely connected domains. Zbl 1094.30026 Avkhadiev, F. G.; Wirths, K.-J. 5 2006 Concave schlicht functions with bounded opening angle at infinity. Zbl 1071.30005 Avkhadiev, F. G.; Wirths, K.-J. 13 2005 The conformal radius as a function and its gradient image. Zbl 1096.30013 Avkhadiev, F. G.; Wirths, K.-J. 9 2005 Julia’s lemma and concave schlicht functions. Zbl 1074.30013 Wirths, Karl-Joachim 3 2005 On the coefficients of concave univalent functions. Zbl 1149.30013 Avkhadiev, Farit G.; Pommerenke, Christian; Wirths, Karl-Joachim 15 2004 Schwarz-Pick inequalities for hyperbolic domains in the extended plane. Zbl 1066.30025 Avkhadiev, Farit G.; Wirths, Karl-Joachim 8 2004 A proof of the Livingston conjecture for the fourth and the fifth coefficient of concave univalent functions. Zbl 1058.30018 Wirths, Karl-Joachim 4 2004 Poles near the origin produce lower bounds for coefficients of meromorphic univalent functions. Zbl 1061.30015 Avkhadiev, F. G.; Wirths, K.-J. 2 2004 Schwarz-Pick inequalities for derivatives of arbitrary order. Zbl 1018.30018 Avkhadiev, F. G.; Wirths, K.-J. 17 2003 Punishing factors for angles. Zbl 1072.30014 Avkhadiev, Farit G.; Wirths, Karl-Joachim 3 2003 The Koebe domain for concave univalent functions. Zbl 1045.91009 Wirths, Karl-Joachim 2 2003 Convex holes produce lower bounds for coefficients. Zbl 1028.30010 Avkhadiev, F. G.; Wirths, K.-J. 16 2002 Global integral criteria for composition operators. Zbl 1015.30017 Wirths, K.-J.; Xiao, J. 7 2002 Recognizing \(\mathfrak{Q}_{p,0}\) functions per Dirichlet space structure. Zbl 0989.30024 Wirths, K. J.; Xiao, J. 15 2001 Taylor coefficients of negative powers of schlicht functions. Zbl 1032.30017 Roth, Oliver; Wirths, Karl-Joachim 3 2001 Duality for some large spaces of analytic functions. Zbl 1001.46014 Jarchow, H.; Montesinos, V.; Wirths, K. J.; Xiao, J. 2 2001 A short proof of a theorem of Bertilsson by direct use of Loewner’s method. Zbl 1075.30501 Wirths, Karl-Joachim 1 2001 An image-area inequality for some planar holomorphic maps. Zbl 0954.30017 Wirths, K. J.; Xiao, J. 11 2000 Bounds for the Taylor coefficients of locally univalent Bloch functions. Zbl 1020.30036 Wirths, K.-J. 1 2000 Image areas of functions in the Dirichlet type spaces and their Möbius invariant subspaces. Zbl 0878.30027 Wirths, Karl J.; Xiao, Jie 1 1996 On an extremum problem for Bloch functions. Zbl 0786.30024 Wirths, Karl-Joachim 2 1993 Semi-dual functions and nonvanishing entire functions. Zbl 0797.30007 Wirths, K.-J. 2 1992 A note on Re(f(z)/z) for univalent functions. Zbl 0701.30013 Wirths, Karl-Joachim 2 1989 Coefficient bounds for convex functions of bounded type. Zbl 0655.30014 Wirths, K.-J. 3 1988 Normal families of gap power series. Zbl 0623.30044 Ruscheweyh, St.; Wirths, K.-J. 5 1986 On a boundary-value problem for convex univalent functions. Zbl 0615.30010 Ruscheweyh, Stephan; Singh, Vikramatidya; Wirths, Karl-Joachim 1 1986 On an extremal problem for bounded polynomials. Zbl 0602.41005 Ruscheweyh, Stephan; Wirths, Karl-Joachim 3 1985 Extreme Bloch functions with many critical points. Zbl 0561.30023 Ruscheweyh, St.; Wirths, K. J. 4 1984 Optimal recovery of the derivative of bounded analytic functions. Zbl 0519.30032 Rivlin, T. J.; Ruscheweyh, St.; Shaffer, D.; Wirths, K. J. 1 1983 On extreme Bloch functions with prescribed critical points. Zbl 0482.30023 Ruscheweyh, Stephan; Wirths, Karl-Joachim 11 1982 On holomorphic functions satisfying \(| f(z)|(1 - | z|^ 2)\leq 1\) in the unit disc. Zbl 0484.30001 Wirths, Karl-Joachim 1 1982 Two new extremal properties of the Koebe-function. Zbl 0413.30017 Klouth, Richard; Wirths, K.-J. 2 1980 Koeffizientenabschätzungen für typisch-reelle Funktionen. Zbl 0467.30014 Asim, Mohammed Hakim; Wirths, Karl Joachim 1 1979 Über holomorphe Funktionen, die einer Wachstumsbeschränkung unterliegen. Zbl 0373.30016 Wirths, Karl-Joachim 11 1978 Riemann’s mapping theorem for n-analytic functions. Zbl 0343.30007 Ruscheweyh, St.; Wirths, K.-J. 1 1976 Convex sums of convex univalent functions. Zbl 0369.30005 Ruscheweyh, St.; Wirths, K.-J. 1 1976 Über totalmonotone Zahlenfolgen. Zbl 0313.30009 Wirths, Karl-Joachim 12 1975 Bemerkungen zu einem Satz von Fejer. Zbl 0321.30006 Wirths, K.-J. 1 1975 Über die Faltung schlichter Funktionen. II. (On the convolution of schlicht functions. II). Zbl 0235.30009 Ruscheweyh, Stephan; Wirths, Karl-Joachim 3 1973 Über die Koeffizienten spezieller schlichter Polynome. Zbl 0244.30013 Ruscheweyh, St.; Wirths, K.-J. 3 1973 Verallgemeinerungen eines Maximumprinzips. Zbl 0239.30013 Wirths, Karl-Joachim 7 1971 all cited Publications top 5 cited Publications all top 5 Cited by 369 Authors 50 Ponnusamy, Saminathan 48 Avkhadiev, Farit Gabidinovich 44 Wirths, Karl-Joachim 22 Bhowmik, Bappaditya 19 Nasibullin, Ramil Gaisa’evich 16 Obradović, Milutin 13 Sugawa, Toshiyuki 11 Kayumov, Il’giz Rifatovich 9 Ruscheweyh, Stephan 9 Sahoo, Swadesh Kumar 7 Allu, Vasudevarao 7 Arora, Vibhuti 7 Chen, Shaolin 7 Liu, Mingsheng 7 Shafigullin, Il’nar Kasyĭmovich 7 Tuneski, Nikola 6 Ali, Md Firoz 6 Parveen, Firdoshi 6 Vasudevarao, Allu 5 Ahamed, Molla Basir 5 Aksent’ev, Leonid Aleksandrovich 5 Das, Nilanjan 5 Kazantsev, Andreĭ Vital’evich 5 Liu, Gang 5 Maharana, Sudhananda 5 Prajapat, Jugal Kishore 5 Rasila, Antti 5 Sharma, Navneet Lal 5 Xu, Qinghua 4 Adegani, Ebrahim Analouei 4 Akhmetova, A. N. 4 El-Fallah, Omar 4 Grahl, Jürgen 4 Hamada, Hidetaka 4 Kumar, Shankey 4 Laptev, Ari 4 Li, Liulan 4 Liu, Taishun 4 Liu, Yang 4 Makarov, R. V. 4 Mejia, Diego 4 Srivastava, Hari Mohan 4 Stević, Stevo 4 Todorov, Pavel Georgiev 4 Vuorinen, Matti Keijo Kustaa 4 Wang, Jianfei 4 Xiao, Jie 3 Agrawal, Sarita 3 Ali, Rosihan Mohamed 3 Andrievskii, Vladimir V. 3 Arbeláez, Hugo 3 Bulboacă, Teodor 3 Chen, Zhihua 3 Cho, Nak Eun 3 Ebadian, Ali 3 Galanopoulos, Petros 3 Huang, Yong 3 Kargar, Rahim 3 Kasten, Volker 3 Kowalczyk, Bogumiła 3 Lecko, Adam 3 Majee, Santana 3 Nasyrov, Semen R. 3 Ohno, Rintaro 3 Pal, Sanjit 3 Roth, Oliver 3 Vukotić, Dragan 2 Ahammed, Sabir 2 Alimohammadi, Davood 2 Altinkaya, Şahsene 2 Arango, Juan H. 2 Bonk, Mario 2 Contreras, Manuel D. 2 Cruz, Lorena 2 El Ibbaoui, Mohamed 2 Fan, Jinhua 2 Gochhayat, Priyabrat 2 Graf, Sergey Yu. 2 Halder, Himadri 2 Jocić, Danko R. 2 Kellay, Karim 2 Khammatova, Diana M. 2 Kim, Seong-A 2 Kovařík, Hynek 2 Laitila, Jussi 2 Lam, Nguyen 2 Lee, See Keong 2 Lu, Guozhen 2 Martín, María J. 2 Mehrez, Khaled 2 Merchán, Noel 2 Orhan, Halit 2 Peng, Zhigang 2 Pommerenke, Christian 2 Prajapati, Anuja 2 Qiao, Jinjing 2 Ravichandran, Vaithiyanathan 2 Salinas, Luis Carrasco 2 Satpati, Goutam 2 Schmieder, Gerald ...and 269 more Authors all top 5 Cited in 127 Serials 28 Journal of Mathematical Analysis and Applications 25 Lobachevskii Journal of Mathematics 22 Computational Methods and Function Theory 19 Russian Mathematics 11 Journal of Functional Analysis 11 Bulletin of the Malaysian Mathematical Sciences Society. Second Series 10 Monatshefte für Mathematik 10 Complex Variables and Elliptic Equations 9 Proceedings of the American Mathematical Society 9 Results in Mathematics 8 The Journal of Analysis 8 Mediterranean Journal of Mathematics 8 Complex Analysis and Operator Theory 8 Analysis and Mathematical Physics 6 Mathematische Nachrichten 6 Ufimskiĭ Matematicheskiĭ Zhurnal 5 Journal d’Analyse Mathématique 5 Archiv der Mathematik 5 Siberian Mathematical Journal 5 Bulletin des Sciences Mathématiques 5 Acta Mathematica Sinica. English Series 5 Journal of Function Spaces 4 International Journal of Mathematics and Mathematical Sciences 4 Mathematische Zeitschrift 4 Journal of Mathematical Sciences (New York) 4 Filomat 4 Journal of the Australian Mathematical Society 4 Revista de la Real Academia de Ciencias Exactas, Físicas y Naturales. Serie A: Matemáticas. RACSAM 4 Journal of Classical Analysis 3 Bulletin of the Australian Mathematical Society 3 Israel Journal of Mathematics 3 Rocky Mountain Journal of Mathematics 3 Mathematica Slovaca 3 Zeitschrift für Analysis und ihre Anwendungen 3 Abstract and Applied Analysis 3 Acta Mathematica Scientia. Series B. (English Edition) 3 Journal of Mathematical Inequalities 3 Problemy Analiza. Issues of Analysis 2 Houston Journal of Mathematics 2 Mathematical Notes 2 Russian Mathematical Surveys 2 Ukrainian Mathematical Journal 2 Advances in Mathematics 2 Czechoslovak Mathematical Journal 2 Integral Equations and Operator Theory 2 Journal of Computational and Applied Mathematics 2 Michigan Mathematical Journal 2 Nonlinear Analysis. Theory, Methods & Applications. Series A: Theory and Methods 2 Bulletin of the Korean Mathematical Society 2 Acta Mathematica Hungarica 2 Bulletin of the Iranian Mathematical Society 2 Revista Matemática Iberoamericana 2 Izvestiya: Mathematics 2 Journal of Inequalities and Applications 2 Communications of the Korean Mathematical Society 2 Comptes Rendus. Mathématique. Académie des Sciences, Paris 2 Frontiers of Mathematics in China 2 Asian-European Journal of Mathematics 2 Annals of Functional Analysis 1 Mathematical Proceedings of the Cambridge Philosophical Society 1 Mathematische Semesterberichte 1 Arkiv för Matematik 1 Abhandlungen aus dem Mathematischen Seminar der Universität Hamburg 1 Applied Mathematics and Computation 1 Canadian Journal of Mathematics 1 Canadian Mathematical Bulletin 1 Collectanea Mathematica 1 Demonstratio Mathematica 1 Illinois Journal of Mathematics 1 Journal of Approximation Theory 1 Journal of the Korean Mathematical Society 1 Kodai Mathematical Journal 1 Matematički Vesnik 1 Mathematica Scandinavica 1 Proceedings of the Edinburgh Mathematical Society. Series II 1 Proceedings of the Japan Academy. Series A 1 Tamkang Journal of Mathematics 1 Tôhoku Mathematical Journal. Second Series 1 Transactions of the American Mathematical Society 1 Chinese Annals of Mathematics. Series B 1 Applied Mathematics Letters 1 Forum Mathematicum 1 The Journal of Geometric Analysis 1 Journal of Contemporary Mathematical Analysis. Armenian Academy of Sciences 1 Journal de Mathématiques Pures et Appliquées. Neuvième Série 1 Proceedings of the Indian Academy of Sciences. Mathematical Sciences 1 Expositiones Mathematicae 1 Indagationes Mathematicae. New Series 1 Annales de la Faculté des Sciences de Toulouse. Mathématiques. Série VI 1 Potential Analysis 1 Calculus of Variations and Partial Differential Equations 1 Applied and Computational Harmonic Analysis 1 St. Petersburg Mathematical Journal 1 Turkish Journal of Mathematics 1 Advances in Applied Clifford Algebras 1 Boletín de la Sociedad Matemática Mexicana. Third Series 1 Electronic Communications in Probability 1 Sbornik: Mathematics 1 Annales Academiae Scientiarum Fennicae. Mathematica 1 Mathematical Inequalities & Applications ...and 27 more Serials all top 5 Cited in 30 Fields 307 Functions of a complex variable (30-XX) 48 Real functions (26-XX) 39 Potential theory (31-XX) 28 Several complex variables and analytic spaces (32-XX) 26 Functional analysis (46-XX) 23 Operator theory (47-XX) 19 Special functions (33-XX) 19 Partial differential equations (35-XX) 4 Probability theory and stochastic processes (60-XX) 3 Number theory (11-XX) 3 Sequences, series, summability (40-XX) 3 Approximations and expansions (41-XX) 3 Differential geometry (53-XX) 2 History and biography (01-XX) 2 Algebraic geometry (14-XX) 2 Linear and multilinear algebra; matrix theory (15-XX) 2 Difference and functional equations (39-XX) 2 Harmonic analysis on Euclidean spaces (42-XX) 2 Calculus of variations and optimal control; optimization (49-XX) 2 Numerical analysis (65-XX) 1 Combinatorics (05-XX) 1 Measure and integration (28-XX) 1 Ordinary differential equations (34-XX) 1 Integral transforms, operational calculus (44-XX) 1 Integral equations (45-XX) 1 Geometry (51-XX) 1 Convex and discrete geometry (52-XX) 1 Global analysis, analysis on manifolds (58-XX) 1 Fluid mechanics (76-XX) 1 Statistical mechanics, structure of matter (82-XX) Citations by Year