Edit Profile (opens in new tab) Wirths, Karl-Joachim Compute Distance To: Compute 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: 120 Publications since 1971, including 5 Books 1 Further Contribution Reviewing Activity: 139 Reviews Biographic References: 1 Publication Co-Authors: 26 Co-Authors with 95 Joint Publications 661 Co-Co-Authors all top 5 Co-Authors 26 single-authored 28 Avkhadiev, Farit Gabidinovich 27 Ponnusamy, Saminathan 14 Ruscheweyh, Stephan 11 Bhowmik, Bappaditya 8 Obradović, Milutin 6 Kayumov, Il’giz Rifatovich 6 Xiao, Jie 2 Bonk, Mario 2 Gräter, Joachim 2 Pommerenke, Christian 2 Roth, Oliver 2 Sharma, Navneet Lal 2 Vijayakumar, Ramakrishnan 1 Asim, Mohammed Hakim 1 Balasubramanian, Ramachandran 1 Jank, Gerhard 1 Jarchow, Hans 1 Khammatova, Diana M. 1 Klouth, Richard 1 Li, Liulan 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 The College Mathematics Journal 1 Analysis and Mathematical Physics 1 Problemy Analiza. Issues of Analysis 1 Frontiers in Mathematics all top 5 Fields 107 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) 2 Potential theory (31-XX) 2 Several complex variables and analytic spaces (32-XX) 2 Approximations and expansions (41-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 86 Publications have been cited 638 times in 341 Documents Cited by ▼ Year ▼ Schwarz-Pick type inequalities. Zbl 1168.30001Avkhadiev, Farit G.; Wirths, Karl-Joachim 47 2009 Unified Poincaré and Hardy inequalities with sharp constants for convex domains. Zbl 1145.26005Avkhadiev, F. G.; Wirths, K.-J. 46 2007 On the Fekete-Szegö problem for concave univalent functions. Zbl 1202.30015Bhowmik, B.; Ponnusamy, S.; Wirths, K.-J. 31 2011 Sharp Hardy-type inequalities with Lamb’s constant. Zbl 1237.26014Avkhadiev, F. G.; Wirths, K.-J. 27 2011 Sharp inequalities for the coefficients of concave schlicht functions. Zbl 1210.30005Avkhadiev, F. G.; Pommerenke, Ch.; Wirths, K.-J. 23 2006 Geometric studies on the class \(\mathcal U(\lambda)\). Zbl 1348.30009Obradović, Milutin; Ponnusamy, Saminathan; Wirths, Karl-Joachim 22 2016 Coefficient characterizations and sections for some univalent functions. Zbl 1283.30047Obradović, Milutin; Ponnusamy, Saminathan; Wirths, Karl-Joachim 21 2013 Weighted Hardy inequalities with sharp constants. Zbl 1254.26031Avkhadiev, F. G.; Wirths, K.-J. 18 2010 A proof of the Livingston conjecture. Zbl 1109.30021Avkhadiev, Farit G.; Wirths, Karl-Joachim 17 2007 Schwarz-Pick inequalities for derivatives of arbitrary order. Zbl 1018.30018Avkhadiev, F. G.; Wirths, K.-J. 17 2003 Logarithmic coefficients and a coefficient conjecture for univalent functions. Zbl 1400.30027Obradović, Milutin; Ponnusamy, Saminathan; Wirths, Karl-Joachim 17 2018 New inequalities for the coefficients of unimodular bounded functions. Zbl 1442.30003Ponnusamy, Saminathan; Vijayakumar, Ramakrishnan; Wirths, Karl-Joachim 17 2020 Recognizing \(\mathfrak{Q}_{p,0}\) functions per Dirichlet space structure. Zbl 0989.30024Wirths, K. J.; Xiao, J. 15 2001 On the coefficients of concave univalent functions. Zbl 1149.30013Avkhadiev, Farit G.; Pommerenke, Christian; Wirths, Karl-Joachim 15 2004 Convex holes produce lower bounds for coefficients. Zbl 1028.30010Avkhadiev, F. G.; Wirths, K.-J. 15 2002 Concave schlicht functions with bounded opening angle at infinity. Zbl 1071.30005Avkhadiev, F. G.; Wirths, K.-J. 14 2005 On the problem of Gromova and Vasil’ev on integral means, and Yamashita’s conjecture for spirallike functions. Zbl 1295.30042Ponnusamy, Saminathan; Wirths, Karl-Joachim 12 2014 A proof of Yamashita’s conjecture on area integral. Zbl 1283.30031Obradović, Milutin; Ponnusamy, Saminathan; Wirths, Karl-Joachim 12 2013 Über totalmonotone Zahlenfolgen. Zbl 0313.30009Wirths, Karl-Joachim 12 1975 An image-area inequality for some planar holomorphic maps. Zbl 0954.30017Wirths, K. J.; Xiao, J. 11 2000 On extreme Bloch functions with prescribed critical points. Zbl 0482.30023Ruscheweyh, Stephan; Wirths, Karl-Joachim 11 1982 Über holomorphe Funktionen, die einer Wachstumsbeschränkung unterliegen. Zbl 0373.30016Wirths, Karl-Joachim 10 1978 On the best constants for the Brezis-Marcus inequalities in balls. Zbl 1259.26025Avkhadiev, F. G.; Wirths, K. J. 10 2012 Global integral criteria for composition operators. Zbl 1015.30017Wirths, K.-J.; Xiao, J. 8 2002 Schwarz-Pick inequalities for hyperbolic domains in the extended plane. Zbl 1066.30025Avkhadiev, Farit G.; Wirths, Karl-Joachim 8 2004 The conformal radius as a function and its gradient image. Zbl 1096.30013Avkhadiev, F. G.; Wirths, K.-J. 8 2005 Domains of variability of Laurent coefficients and the convex hull for the family of concave univalent functions. Zbl 1148.30006Bhowmik, Bappaditya; Ponnusamy, Saminathan; Wirths, Karl-Joachim 8 2007 Integral means and Dirichlet integral for analytic functions. Zbl 1309.30019Obradović, Milutin; Ponnusamy, S.; Wirths, Karl-Joachim 8 2015 Characterization and the pre-Schwarzian norm estimate for concave univalent functions. Zbl 1201.30008Bhowmik, Bappaditya; Ponnusamy, Saminathan; Wirths, Karl-Joachim 7 2010 Bohr type inequalities for functions with a multiple zero at the origin. Zbl 1461.30004Ponnusamy, S.; Wirths, K.-J. 6 2020 On the residuum of concave univalent functions. Zbl 1164.30355Wirths, K.-J. 6 2006 Verallgemeinerungen eines Maximumprinzips. Zbl 0239.30013Wirths, Karl-Joachim 6 1971 Improved Bohr’s phenomenon in quasi-subordination classes. Zbl 1475.30005Ponnusamy, Saminathan; Vijayakumar, Ramakrishnan; Wirths, Karl-Joachim 6 2022 Coefficient problems on the class \(U(\lambda)\). Zbl 1427.30029Ponnusamy, Saminathan; Wirths, Karl-Joachim 5 2018 Normal families of gap power series. Zbl 0623.30044Ruscheweyh, St.; Wirths, K.-J. 5 1986 Punishing factors for finitely connected domains. Zbl 1094.30026Avkhadiev, F. G.; Wirths, K.-J. 5 2006 Elementary considerations for classes of meromorphic univalent functions. Zbl 1401.30026Ponnusamy, S.; Wirths, K.-J. 5 2018 Analogues to Landau’s inequality for nonvanishing bounded functions and for Bloch functions. Zbl 1421.30074Kayumov, I. R.; Wirths, K.-J. 5 2019 Where is \(f (z) / f'(z)\) univalent? Zbl 1336.30018Obradović, Milutin; Ponnusamy, Saminathan; Wirths, Karl-Joachim 4 2014 Subordination under concave univalent functions. Zbl 1129.30004Avkhadiev, F. G.; Wirths, K.-J. 4 2007 A proof of the Livingston conjecture for the fourth and the fifth coefficient of concave univalent functions. Zbl 1058.30018Wirths, Karl-Joachim 4 2004 Logarithmic coefficients of the inverse of univalent functions. Zbl 1404.30023Ponnusamy, Saminathan; Sharma, Navneet Lal; Wirths, Karl-Joachim 4 2018 Extreme Bloch functions with many critical points. Zbl 0561.30023Ruscheweyh, St.; Wirths, K. J. 4 1984 Coefficients problems for Bloch functions. Zbl 1430.30017Kayumov, I. R.; Wirths, K.-J. 4 2019 Concave functions, Blaschke products, and polygonal mappings. Zbl 1224.30035Bhowmik, Bappaditya; Ponnusamy, Saminathan; Wirths, Karl-Joachim 4 2009 Julia’s lemma and concave schlicht functions. Zbl 1074.30013Wirths, Karl-Joachim 3 2005 Punishing factors for angles. Zbl 1072.30014Avkhadiev, Farit G.; Wirths, Karl-Joachim 3 2003 Taylor coefficients of negative powers of schlicht functions. Zbl 1032.30017Roth, Oliver; Wirths, Karl-Joachim 3 2001 Coefficient bounds for convex functions of bounded type. Zbl 0655.30014Wirths, K.-J. 3 1988 On an extremal problem for bounded polynomials. Zbl 0602.41005Ruscheweyh, Stephan; Wirths, Karl-Joachim 3 1985 Unbounded convex polygons, Blaschke products and concave schlicht functions. Zbl 1161.30006Bhowmik, B.; Ponnusamy, S.; Wirths, K.-J. 3 2008 Über die Faltung schlichter Funktionen. II. (On the convolution of schlicht functions. II). Zbl 0235.30009Ruscheweyh, Stephan; Wirths, Karl-Joachim 3 1973 Über die Koeffizienten spezieller schlichter Polynome. Zbl 0244.30013Ruscheweyh, St.; Wirths, K.-J. 3 1973 Logarithmic coefficients problems in families related to starlike and convex functions. Zbl 1440.30004Ponnusamy, Saminathan; Sharma, Navneet Lal; Wirths, Karl-Joachim 3 2020 On some problems of James Miller. Zbl 1218.30019Bhowmik, B.; Ponnusamy, S.; Wirths, K.-J. 3 2010 Telescoping estimates for smooth series. Zbl 1309.26026Wirths, Karl Joachim 2 2015 Semi-dual functions and nonvanishing entire functions. Zbl 0797.30007Wirths, K.-J. 2 1992 On classes of meromorphic locally univalent functions defined by differential inequalities. Zbl 1439.30029Lee, See Keong; Ponnusamy, Saminathan; Wirths, Karl-Joachim 2 2020 Duality for some large spaces of analytic functions. Zbl 1001.46014Jarchow, H.; Montesinos, V.; Wirths, K. J.; Xiao, J. 2 2001 On an extremum problem for Bloch functions. Zbl 0786.30024Wirths, Karl-Joachim 2 1993 The Koebe domain for concave univalent functions. Zbl 1045.91009Wirths, Karl-Joachim 2 2003 Two new extremal properties of the Koebe-function. Zbl 0413.30017Klouth, Richard; Wirths, K.-J. 2 1980 Poles near the origin produce lower bounds for coefficients of meromorphic univalent functions. Zbl 1061.30015Avkhadiev, F. G.; Wirths, K.-J. 2 2004 Inequalities for the coefficients of meromorphic starlike functions with nonzero pole. Zbl 1303.30012Bhowmik, Bappaditya; Wirths, Karl-Joachim 2 2014 On the sum of squares of the coefficients of Bloch functions. Zbl 1420.30015Kayumov, I. R.; Wirths, K.-J. 2 2019 Sharp bounds for sums of coefficients of inverses of convex functions. Zbl 1147.30013Avkhadiev, Farit G.; Wirths, Karl-Joachim 2 2007 A note on Re(f(z)/z) for univalent functions. Zbl 0701.30013Wirths, Karl-Joachim 2 1989 On relations between the classes \(\mathcal {S}\) and \(\mathcal {U}\). Zbl 1362.30017Obradović, Milutin; Ponnusamy, Saminathan; Wirths, Karl-Joachim 2 2016 On elementary bounds for \(\sum^{\infty}_{k=n}k^{-s}\). Zbl 1339.40003Gräter, Joachim; Wirths, Karl-Joachim 1 2015 Punishing factors and Chua’s conjecture. Zbl 1129.30013Avkhadiev, F. G.; Wirths, K.-J. 1 2007 Coefficient inequalities for Bloch functions. Zbl 1433.30060Kayumov, I. R.; Wirths, K.-J. 1 2019 Inequalities of Carlson type for \(\alpha\)-Bloch functions. Zbl 1441.30049Kayumov, I. R.; Wirths, Karl-Joachim 1 2020 On Landau’s type estimates for coefficients of univalent functions. Zbl 1468.30039Kayumov, I. R.; Khammatova, D. M.; Wirths, K.-J. 1 2020 Image areas of functions in the Dirichlet type spaces and their Möbius invariant subspaces. Zbl 0878.30027Wirths, Karl J.; Xiao, Jie 1 1996 On holomorphic functions satisfying \(| f(z)|(1 - | z|^ 2)\leq 1\) in the unit disc. Zbl 0484.30001Wirths, Karl-Joachim 1 1982 Optimal recovery of the derivative of bounded analytic functions. Zbl 0519.30032Rivlin, T. J.; Ruscheweyh, St.; Shaffer, D.; Wirths, K. J. 1 1983 A short proof of a theorem of Bertilsson by direct use of Loewner’s method. Zbl 1075.30501Wirths, Karl-Joachim 1 2001 Koeffizientenabschätzungen für typisch-reelle Funktionen. Zbl 0467.30014Asim, Mohammed Hakim; Wirths, Karl Joachim 1 1979 Bounds for the Taylor coefficients of locally univalent Bloch functions. Zbl 1020.30036Wirths, K.-J. 1 2000 On a boundary-value problem for convex univalent functions. Zbl 0615.30010Ruscheweyh, Stephan; Singh, Vikramatidya; Wirths, Karl-Joachim 1 1986 Starlike cases of the generalized Goodman conjecture. Zbl 1279.30010Avkhadiev, F. G.; Wirths, K.-J. 1 2013 Bemerkungen zu einem Satz von Fejer. Zbl 0321.30006Wirths, K.-J. 1 1975 Riemann’s mapping theorem for n-analytic functions. Zbl 0343.30007Ruscheweyh, St.; Wirths, K.-J. 1 1976 The punishing factors for convex pairs are \(2^{n-1}\). Zbl 1147.30014Avkhadiev, Farit G.; Wirths, Karl-Joachim 1 2007 Estimates of the derivatives of meromorphic maps from convex domains into concave domains. Zbl 1155.30003Avkhadiev, Farit G.; Wirths, Karl-Joachim 1 2008 A sharp bound for the Schwarzian derivative of concave functions. Zbl 1267.30035Bhowmik, Bappaditya; Wirths, Karl-Joachim 1 2012 Improved Bohr’s phenomenon in quasi-subordination classes. Zbl 1475.30005Ponnusamy, Saminathan; Vijayakumar, Ramakrishnan; Wirths, Karl-Joachim 6 2022 New inequalities for the coefficients of unimodular bounded functions. Zbl 1442.30003Ponnusamy, Saminathan; Vijayakumar, Ramakrishnan; Wirths, Karl-Joachim 17 2020 Bohr type inequalities for functions with a multiple zero at the origin. Zbl 1461.30004Ponnusamy, S.; Wirths, K.-J. 6 2020 Logarithmic coefficients problems in families related to starlike and convex functions. Zbl 1440.30004Ponnusamy, Saminathan; Sharma, Navneet Lal; Wirths, Karl-Joachim 3 2020 On classes of meromorphic locally univalent functions defined by differential inequalities. Zbl 1439.30029Lee, See Keong; Ponnusamy, Saminathan; Wirths, Karl-Joachim 2 2020 Inequalities of Carlson type for \(\alpha\)-Bloch functions. Zbl 1441.30049Kayumov, I. R.; Wirths, Karl-Joachim 1 2020 On Landau’s type estimates for coefficients of univalent functions. Zbl 1468.30039Kayumov, I. R.; Khammatova, D. M.; Wirths, K.-J. 1 2020 Analogues to Landau’s inequality for nonvanishing bounded functions and for Bloch functions. Zbl 1421.30074Kayumov, I. R.; Wirths, K.-J. 5 2019 Coefficients problems for Bloch functions. Zbl 1430.30017Kayumov, I. R.; Wirths, K.-J. 4 2019 On the sum of squares of the coefficients of Bloch functions. Zbl 1420.30015Kayumov, I. R.; Wirths, K.-J. 2 2019 Coefficient inequalities for Bloch functions. Zbl 1433.30060Kayumov, I. R.; Wirths, K.-J. 1 2019 Logarithmic coefficients and a coefficient conjecture for univalent functions. Zbl 1400.30027Obradović, Milutin; Ponnusamy, Saminathan; Wirths, Karl-Joachim 17 2018 Coefficient problems on the class \(U(\lambda)\). Zbl 1427.30029Ponnusamy, Saminathan; Wirths, Karl-Joachim 5 2018 Elementary considerations for classes of meromorphic univalent functions. Zbl 1401.30026Ponnusamy, S.; Wirths, K.-J. 5 2018 Logarithmic coefficients of the inverse of univalent functions. Zbl 1404.30023Ponnusamy, Saminathan; Sharma, Navneet Lal; Wirths, Karl-Joachim 4 2018 Geometric studies on the class \(\mathcal U(\lambda)\). Zbl 1348.30009Obradović, Milutin; Ponnusamy, Saminathan; Wirths, Karl-Joachim 22 2016 On relations between the classes \(\mathcal {S}\) and \(\mathcal {U}\). Zbl 1362.30017Obradović, Milutin; Ponnusamy, Saminathan; Wirths, Karl-Joachim 2 2016 Integral means and Dirichlet integral for analytic functions. Zbl 1309.30019Obradović, Milutin; Ponnusamy, S.; Wirths, Karl-Joachim 8 2015 Telescoping estimates for smooth series. Zbl 1309.26026Wirths, Karl Joachim 2 2015 On elementary bounds for \(\sum^{\infty}_{k=n}k^{-s}\). Zbl 1339.40003Gräter, 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 1295.30042Ponnusamy, Saminathan; Wirths, Karl-Joachim 12 2014 Where is \(f (z) / f'(z)\) univalent? Zbl 1336.30018Obradović, Milutin; Ponnusamy, Saminathan; Wirths, Karl-Joachim 4 2014 Inequalities for the coefficients of meromorphic starlike functions with nonzero pole. Zbl 1303.30012Bhowmik, Bappaditya; Wirths, Karl-Joachim 2 2014 Coefficient characterizations and sections for some univalent functions. Zbl 1283.30047Obradović, Milutin; Ponnusamy, Saminathan; Wirths, Karl-Joachim 21 2013 A proof of Yamashita’s conjecture on area integral. Zbl 1283.30031Obradović, Milutin; Ponnusamy, Saminathan; Wirths, Karl-Joachim 12 2013 Starlike cases of the generalized Goodman conjecture. Zbl 1279.30010Avkhadiev, F. G.; Wirths, K.-J. 1 2013 On the best constants for the Brezis-Marcus inequalities in balls. Zbl 1259.26025Avkhadiev, F. G.; Wirths, K. J. 10 2012 A sharp bound for the Schwarzian derivative of concave functions. Zbl 1267.30035Bhowmik, Bappaditya; Wirths, Karl-Joachim 1 2012 On the Fekete-Szegö problem for concave univalent functions. Zbl 1202.30015Bhowmik, B.; Ponnusamy, S.; Wirths, K.-J. 31 2011 Sharp Hardy-type inequalities with Lamb’s constant. Zbl 1237.26014Avkhadiev, F. G.; Wirths, K.-J. 27 2011 Weighted Hardy inequalities with sharp constants. Zbl 1254.26031Avkhadiev, F. G.; Wirths, K.-J. 18 2010 Characterization and the pre-Schwarzian norm estimate for concave univalent functions. Zbl 1201.30008Bhowmik, Bappaditya; Ponnusamy, Saminathan; Wirths, Karl-Joachim 7 2010 On some problems of James Miller. Zbl 1218.30019Bhowmik, B.; Ponnusamy, S.; Wirths, K.-J. 3 2010 Schwarz-Pick type inequalities. Zbl 1168.30001Avkhadiev, Farit G.; Wirths, Karl-Joachim 47 2009 Concave functions, Blaschke products, and polygonal mappings. Zbl 1224.30035Bhowmik, Bappaditya; Ponnusamy, Saminathan; Wirths, Karl-Joachim 4 2009 Unbounded convex polygons, Blaschke products and concave schlicht functions. Zbl 1161.30006Bhowmik, B.; Ponnusamy, S.; Wirths, K.-J. 3 2008 Estimates of the derivatives of meromorphic maps from convex domains into concave domains. Zbl 1155.30003Avkhadiev, Farit G.; Wirths, Karl-Joachim 1 2008 Unified Poincaré and Hardy inequalities with sharp constants for convex domains. Zbl 1145.26005Avkhadiev, F. G.; Wirths, K.-J. 46 2007 A proof of the Livingston conjecture. Zbl 1109.30021Avkhadiev, Farit G.; Wirths, Karl-Joachim 17 2007 Domains of variability of Laurent coefficients and the convex hull for the family of concave univalent functions. Zbl 1148.30006Bhowmik, Bappaditya; Ponnusamy, Saminathan; Wirths, Karl-Joachim 8 2007 Subordination under concave univalent functions. Zbl 1129.30004Avkhadiev, F. G.; Wirths, K.-J. 4 2007 Sharp bounds for sums of coefficients of inverses of convex functions. Zbl 1147.30013Avkhadiev, Farit G.; Wirths, Karl-Joachim 2 2007 Punishing factors and Chua’s conjecture. Zbl 1129.30013Avkhadiev, F. G.; Wirths, K.-J. 1 2007 The punishing factors for convex pairs are \(2^{n-1}\). Zbl 1147.30014Avkhadiev, Farit G.; Wirths, Karl-Joachim 1 2007 Sharp inequalities for the coefficients of concave schlicht functions. Zbl 1210.30005Avkhadiev, F. G.; Pommerenke, Ch.; Wirths, K.-J. 23 2006 On the residuum of concave univalent functions. Zbl 1164.30355Wirths, K.-J. 6 2006 Punishing factors for finitely connected domains. Zbl 1094.30026Avkhadiev, F. G.; Wirths, K.-J. 5 2006 Concave schlicht functions with bounded opening angle at infinity. Zbl 1071.30005Avkhadiev, F. G.; Wirths, K.-J. 14 2005 The conformal radius as a function and its gradient image. Zbl 1096.30013Avkhadiev, F. G.; Wirths, K.-J. 8 2005 Julia’s lemma and concave schlicht functions. Zbl 1074.30013Wirths, Karl-Joachim 3 2005 On the coefficients of concave univalent functions. Zbl 1149.30013Avkhadiev, Farit G.; Pommerenke, Christian; Wirths, Karl-Joachim 15 2004 Schwarz-Pick inequalities for hyperbolic domains in the extended plane. Zbl 1066.30025Avkhadiev, 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 1058.30018Wirths, Karl-Joachim 4 2004 Poles near the origin produce lower bounds for coefficients of meromorphic univalent functions. Zbl 1061.30015Avkhadiev, F. G.; Wirths, K.-J. 2 2004 Schwarz-Pick inequalities for derivatives of arbitrary order. Zbl 1018.30018Avkhadiev, F. G.; Wirths, K.-J. 17 2003 Punishing factors for angles. Zbl 1072.30014Avkhadiev, Farit G.; Wirths, Karl-Joachim 3 2003 The Koebe domain for concave univalent functions. Zbl 1045.91009Wirths, Karl-Joachim 2 2003 Convex holes produce lower bounds for coefficients. Zbl 1028.30010Avkhadiev, F. G.; Wirths, K.-J. 15 2002 Global integral criteria for composition operators. Zbl 1015.30017Wirths, K.-J.; Xiao, J. 8 2002 Recognizing \(\mathfrak{Q}_{p,0}\) functions per Dirichlet space structure. Zbl 0989.30024Wirths, K. J.; Xiao, J. 15 2001 Taylor coefficients of negative powers of schlicht functions. Zbl 1032.30017Roth, Oliver; Wirths, Karl-Joachim 3 2001 Duality for some large spaces of analytic functions. Zbl 1001.46014Jarchow, 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 1075.30501Wirths, Karl-Joachim 1 2001 An image-area inequality for some planar holomorphic maps. Zbl 0954.30017Wirths, K. J.; Xiao, J. 11 2000 Bounds for the Taylor coefficients of locally univalent Bloch functions. Zbl 1020.30036Wirths, K.-J. 1 2000 Image areas of functions in the Dirichlet type spaces and their Möbius invariant subspaces. Zbl 0878.30027Wirths, Karl J.; Xiao, Jie 1 1996 On an extremum problem for Bloch functions. Zbl 0786.30024Wirths, Karl-Joachim 2 1993 Semi-dual functions and nonvanishing entire functions. Zbl 0797.30007Wirths, K.-J. 2 1992 A note on Re(f(z)/z) for univalent functions. Zbl 0701.30013Wirths, Karl-Joachim 2 1989 Coefficient bounds for convex functions of bounded type. Zbl 0655.30014Wirths, K.-J. 3 1988 Normal families of gap power series. Zbl 0623.30044Ruscheweyh, St.; Wirths, K.-J. 5 1986 On a boundary-value problem for convex univalent functions. Zbl 0615.30010Ruscheweyh, Stephan; Singh, Vikramatidya; Wirths, Karl-Joachim 1 1986 On an extremal problem for bounded polynomials. Zbl 0602.41005Ruscheweyh, Stephan; Wirths, Karl-Joachim 3 1985 Extreme Bloch functions with many critical points. Zbl 0561.30023Ruscheweyh, St.; Wirths, K. J. 4 1984 Optimal recovery of the derivative of bounded analytic functions. Zbl 0519.30032Rivlin, T. J.; Ruscheweyh, St.; Shaffer, D.; Wirths, K. J. 1 1983 On extreme Bloch functions with prescribed critical points. Zbl 0482.30023Ruscheweyh, Stephan; Wirths, Karl-Joachim 11 1982 On holomorphic functions satisfying \(| f(z)|(1 - | z|^ 2)\leq 1\) in the unit disc. Zbl 0484.30001Wirths, Karl-Joachim 1 1982 Two new extremal properties of the Koebe-function. Zbl 0413.30017Klouth, Richard; Wirths, K.-J. 2 1980 Koeffizientenabschätzungen für typisch-reelle Funktionen. Zbl 0467.30014Asim, Mohammed Hakim; Wirths, Karl Joachim 1 1979 Über holomorphe Funktionen, die einer Wachstumsbeschränkung unterliegen. Zbl 0373.30016Wirths, Karl-Joachim 10 1978 Riemann’s mapping theorem for n-analytic functions. Zbl 0343.30007Ruscheweyh, St.; Wirths, K.-J. 1 1976 Über totalmonotone Zahlenfolgen. Zbl 0313.30009Wirths, Karl-Joachim 12 1975 Bemerkungen zu einem Satz von Fejer. Zbl 0321.30006Wirths, K.-J. 1 1975 Über die Faltung schlichter Funktionen. II. (On the convolution of schlicht functions. II). Zbl 0235.30009Ruscheweyh, Stephan; Wirths, Karl-Joachim 3 1973 Über die Koeffizienten spezieller schlichter Polynome. Zbl 0244.30013Ruscheweyh, St.; Wirths, K.-J. 3 1973 Verallgemeinerungen eines Maximumprinzips. Zbl 0239.30013Wirths, Karl-Joachim 6 1971 all cited Publications top 5 cited Publications all top 5 Cited by 318 Authors 44 Avkhadiev, Farit Gabidinovich 44 Wirths, Karl-Joachim 42 Ponnusamy, Saminathan 20 Bhowmik, Bappaditya 17 Nasibullin, Ramil Gaisa’evich 13 Obradović, Milutin 11 Sugawa, Toshiyuki 9 Kayumov, Il’giz Rifatovich 9 Ruscheweyh, Stephan 9 Sahoo, Swadesh Kumar 7 Chen, Shaolin 7 Shafigullin, Il’nar Kasyĭmovich 5 Allu, Vasudevarao 5 Arora, Vibhuti 5 Das, Nilanjan 5 Kazantsev, Andreĭ Vital’evich 5 Maharana, Sudhananda 5 Parveen, Firdoshi 5 Prajapat, Jugal Kishore 5 Rasila, Antti 5 Vasudevarao, Allu 5 Xu, Qinghua 4 Aksent’ev, Leonid Aleksandrovich 4 El-Fallah, Omar 4 Grahl, Jürgen 4 Li, Liulan 4 Liu, Taishun 4 Liu, Yang 4 Makarov, R. V. 4 Mejía, Diego Alejandro 4 Sharma, Navneet Lal 4 Stević, Stevo 4 Todorov, Pavel Georgiev 4 Tuneski, Nikola 4 Xiao, Jie 3 Adegani, Ebrahim Analouei 3 Agrawal, Sarita 3 Ahamed, Molla Basir 3 Akhmetova, A. N. 3 Ali, Md Firoz 3 Andrievskii, Vladimir V. 3 Arbeláez, Hugo 3 Chen, Zhihua 3 Cho, Nak Eun 3 Ebadian, Ali 3 Galanopoulos, Petros 3 Halder, Himadri 3 Kasten, Volker 3 Kowalczyk, Bogumiła 3 Laptev, Ari 3 Lecko, Adam 3 Liu, Mingsheng 3 Majee, Santana 3 Ohno, Rintaro 3 Wang, Jianfei 2 Ali, Rosihan Mohamed 2 Alimohammadi, Davood 2 Altinkaya, Şahsene 2 Arango, Juan H. 2 Bonk, Mario 2 Bulboacă, Teodor 2 Contreras, Manuel D. 2 Cruz, Lorena 2 El Ibbaoui, Mohamed 2 Fan, Jinhua 2 Gochhayat, Priyabrat 2 Graf, Sergey Yu. 2 Hamada, Hidetaka 2 Huang, Yong 2 Kargar, Rahim 2 Kellay, Karim 2 Khammatova, Diana M. 2 Kim, Seong-A 2 Kovařík, Hynek 2 Kumar, Shankey 2 Laitila, Jussi 2 Lam, Nguyen 2 Lu, Guozhen 2 Martín, María J. 2 Mehrez, Khaled 2 Merchán, Noel 2 Nasyrov, Semen R. 2 Orhan, Halit 2 Peng, Zhigang 2 Pommerenke, Christian 2 Prajapati, Anuja 2 Qiao, Jinjing 2 Ravichandran, Vaithiyanathan 2 Roth, Oliver 2 Salinas, Luis Carrasco 2 Schmieder, Gerald 2 Shabalin, Pavel Leonidovich 2 Srivastava, Hari Mohan 2 Tripathy, Binod Chandra 2 Vukotić, Dragan 2 Vuorinen, Matti Keijo Kustaa 2 Wang, Xiantao 2 Wang, Zhigang 2 Xiong, Liangpeng 2 Yamashita, Shinji ...and 218 more Authors all top 5 Cited in 117 Serials 25 Journal of Mathematical Analysis and Applications 21 Lobachevskii Journal of Mathematics 21 Computational Methods and Function Theory 18 Russian Mathematics 11 Journal of Functional Analysis 9 Monatshefte für Mathematik 9 Bulletin of the Malaysian Mathematical Sciences Society. 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Académie des Sciences, Paris 2 Frontiers of Mathematics in China 2 Journal of Mathematical Inequalities 2 Asian-European Journal of Mathematics 2 Annales Fennici Mathematici 1 Mathematische Semesterberichte 1 Russian Mathematical Surveys 1 Ukrainian Mathematical Journal 1 Arkiv för Matematik 1 Abhandlungen aus dem Mathematischen Seminar der Universität Hamburg 1 Applied Mathematics and Computation 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 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 Bulletin of the Korean Mathematical Society 1 Chinese Annals of Mathematics. 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New Series 1 Vladikavkazskiĭ Matematicheskiĭ Zhurnal ...and 17 more Serials all top 5 Cited in 30 Fields 260 Functions of a complex variable (30-XX) 44 Real functions (26-XX) 33 Potential theory (31-XX) 25 Functional analysis (46-XX) 24 Several complex variables and analytic spaces (32-XX) 20 Operator theory (47-XX) 19 Special functions (33-XX) 18 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 Algebraic geometry (14-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 History and biography (01-XX) 1 Combinatorics (05-XX) 1 Linear and multilinear algebra; matrix theory (15-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