Edit Profile Hwang, In Sung Compute Distance To: Compute Author ID: hwang.in-sung Published as: Hwang, I. S.; Hwang, In Sung Documents Indexed: 42 Publications since 1998, including 1 Book all top 5 Co-Authors 2 single-authored 27 Lee, Woo Young 8 Curto, Raúl Enrique 6 Kim, An-Hyun 5 Lee, Jun Ik 4 Kang, Dong-Oh 3 Kim, In Hyoun 2 Gu, Caixing 1 Chō, Muneo 1 Im, Sung Mo 1 Kim, Sumin 1 Lee, Sanghan 1 Park, Sewon all top 5 Serials 6 Journal of Mathematical Analysis and Applications 5 Integral Equations and Operator Theory 3 Operators and Matrices 2 Advances in Mathematics 2 Archiv der Mathematik 2 Journal of Functional Analysis 2 Journal of the Korean Mathematical Society 2 Mathematische Annalen 2 Mathematische Nachrichten 2 Journal of Inequalities and Applications 2 Journal of Physics A: Mathematical and Theoretical 1 Linear and Multilinear Algebra 1 Glasgow Mathematical Journal 1 Mathematische Zeitschrift 1 Memoirs of the American Mathematical Society 1 Transactions of the American Mathematical Society 1 Journal of Operator Theory 1 Bulletin of the Korean Mathematical Society 1 Mathematical Inequalities & Applications 1 RIMS Kokyuroku 1 Complex Analysis and Operator Theory all top 5 Fields 40 Operator theory (47-XX) 10 Functions of a complex variable (30-XX) 7 Functional analysis (46-XX) 3 Harmonic analysis on Euclidean spaces (42-XX) 2 Linear and multilinear algebra; matrix theory (15-XX) 1 Several complex variables and analytic spaces (32-XX) 1 Difference and functional equations (39-XX) 1 Abstract harmonic analysis (43-XX) 1 Integral equations (45-XX) Publications by Year all cited Publications top 5 cited Publications Citations contained in zbMATH 29 Publications have been cited 252 times in 159 Documents Cited by ▼ Year ▼ Quartic functional equations. Zbl 1072.39024Lee, Sang Han; Im, Sung Mo; Hwang, In Sung 66 2005 The boundedness below of \(2\times 2\) upper triangular operator matrices. Zbl 0986.47004Hwang, In Sung; Lee, Woo Young 33 2001 Hyponormality and subnormality of block Toeplitz operators. Zbl 1248.47029Curto, Raúl E.; Hwang, In Sung; Lee, Woo Young 16 2012 Hyponormality of trigonometric Toeplitz operators. Zbl 1011.47023Hwang, In Sung; Lee, Woo Young 14 2002 Hyponormality of Toeplitz operators with polynomial symbols. Zbl 0927.47018Hwang, In Sung; Kim, In Hyoun; Lee, Woo Young 14 1999 Hyponormal Toeplitz operators on the Bergman space. Zbl 1085.47027Hwang, In Sung 11 2005 The spectrum is continuous on the set of \(p\)-hyponormal operators. Zbl 0963.47002Hwang, In Sung; Lee, Woo Young 11 2000 Which subnormal Toeplitz operators are either normal or analytic? Zbl 1263.47033Curto, Raúl E.; Hwang, In Sung; Lee, Woo Young 10 2012 Hyponormal Toeplitz operators with rational symbols. Zbl 1122.47023Hwang, In Sung; Lee, Woo Young 8 2006 Hyponormality of Toeplitz operators with rational symbols. Zbl 1129.47025Hwang, In Sung; Lee, Woo Young 8 2006 Subnormal and quasinormal Toeplitz operators with matrix-valued rational symbols. Zbl 1318.47031Curto, Raúl E.; Hwang, In Sung; Kang, Dong-O; Lee, Woo Young 7 2014 Hyponormality of Toeplitz operators with polynomial symbols: An extremal case. Zbl 1016.47024Hwang, In Sung; Kim, In Hyoun; Lee, Woo Young 7 2001 Hyponormal Toeplitz operators on the weighted Bergman spaces. Zbl 1269.47021Hwang, In Sung; Lee, Jongrak 6 2012 Block Toeplitz operators with rational symbols. Zbl 1135.47024Hwang, In Sung; Lee, Woo Young 5 2008 A gap between hyponormality and subnormality for block Toeplitz operators. Zbl 1221.47052Hwang, In Sung; Kang, Dong-O; Lee, Woo Young 4 2011 Joint hyponormality of rational Toeplitz pairs. Zbl 1207.47019Hwang, In Sung; Lee, Woo Young 4 2009 Hyponormality of Toeplitz operators on the Bergman space. Zbl 1163.47017Hwang, In Sung 4 2008 On the continuity of spectra of Toeplitz operators. Zbl 0910.47021Hwang, In Sung; Lee, Woo Young 4 1998 Hyponormal Toeplitz operators with polynomial symbols on weighted Bergman spaces. Zbl 1447.47032Hwang, In Sung; Lee, Jongrak; Park, Se Won 3 2014 Block Toeplitz operators with rational symbols. II. Zbl 1351.47026Hwang, In Sung; Lee, Woo Young 3 2008 Normal singular Cauchy integral operators with operator-valued symbols. Zbl 1356.47053Gu, Caixing; Hwang, In Sung; Kang, Dong-O; Lee, Woo Young 2 2017 Hyponormal Toeplitz operators with matrix-valued circulant symbols. Zbl 1300.47038Hwang, In Sung; Kang, Dong-O.; Lee, Woo Young 2 2013 Hyponormal Toeplitz operators on the Bergman space. II. Zbl 1137.47023Hwang, In Sung; Lee, Jongrak 2 2007 Hyponormality of Toeplitz operators with polynomial and symmetric-type symbols. Zbl 1087.47027Hwang, In Sung; Lee, Woo Young 2 2004 Weak subnormality of operators. Zbl 1022.47013Curto, Raúl E.; Hwang, In Sung; Lee, Woo Young 2 2002 Hyponormality of bounded-type Toeplitz operators. Zbl 1318.47032Curto, Raúl E.; Hwang, In Sung; Lee, Woo Young 1 2014 Erratum to: Joint hyponormality of rational Toeplitz pairs. Zbl 1213.47023Hwang, In Sung; Lee, Woo Young 1 2011 Hyponormality of Toeplitz operators with generalized circulant symbols. Zbl 1154.47021Hwang, In Sung; Kim, In Hyoun 1 2009 On spectral properties of log-hyponormal operators. Zbl 0968.47514Chō, Muneo; Hwang, In Sung; Lee, Jun Ik 1 2000 Normal singular Cauchy integral operators with operator-valued symbols. Zbl 1356.47053Gu, Caixing; Hwang, In Sung; Kang, Dong-O; Lee, Woo Young 2 2017 Subnormal and quasinormal Toeplitz operators with matrix-valued rational symbols. Zbl 1318.47031Curto, Raúl E.; Hwang, In Sung; Kang, Dong-O; Lee, Woo Young 7 2014 Hyponormal Toeplitz operators with polynomial symbols on weighted Bergman spaces. Zbl 1447.47032Hwang, In Sung; Lee, Jongrak; Park, Se Won 3 2014 Hyponormality of bounded-type Toeplitz operators. Zbl 1318.47032Curto, Raúl E.; Hwang, In Sung; Lee, Woo Young 1 2014 Hyponormal Toeplitz operators with matrix-valued circulant symbols. Zbl 1300.47038Hwang, In Sung; Kang, Dong-O.; Lee, Woo Young 2 2013 Hyponormality and subnormality of block Toeplitz operators. Zbl 1248.47029Curto, Raúl E.; Hwang, In Sung; Lee, Woo Young 16 2012 Which subnormal Toeplitz operators are either normal or analytic? Zbl 1263.47033Curto, Raúl E.; Hwang, In Sung; Lee, Woo Young 10 2012 Hyponormal Toeplitz operators on the weighted Bergman spaces. Zbl 1269.47021Hwang, In Sung; Lee, Jongrak 6 2012 A gap between hyponormality and subnormality for block Toeplitz operators. Zbl 1221.47052Hwang, In Sung; Kang, Dong-O; Lee, Woo Young 4 2011 Erratum to: Joint hyponormality of rational Toeplitz pairs. Zbl 1213.47023Hwang, In Sung; Lee, Woo Young 1 2011 Joint hyponormality of rational Toeplitz pairs. Zbl 1207.47019Hwang, In Sung; Lee, Woo Young 4 2009 Hyponormality of Toeplitz operators with generalized circulant symbols. Zbl 1154.47021Hwang, In Sung; Kim, In Hyoun 1 2009 Block Toeplitz operators with rational symbols. Zbl 1135.47024Hwang, In Sung; Lee, Woo Young 5 2008 Hyponormality of Toeplitz operators on the Bergman space. Zbl 1163.47017Hwang, In Sung 4 2008 Block Toeplitz operators with rational symbols. II. Zbl 1351.47026Hwang, In Sung; Lee, Woo Young 3 2008 Hyponormal Toeplitz operators on the Bergman space. II. Zbl 1137.47023Hwang, In Sung; Lee, Jongrak 2 2007 Hyponormal Toeplitz operators with rational symbols. Zbl 1122.47023Hwang, In Sung; Lee, Woo Young 8 2006 Hyponormality of Toeplitz operators with rational symbols. Zbl 1129.47025Hwang, In Sung; Lee, Woo Young 8 2006 Quartic functional equations. Zbl 1072.39024Lee, Sang Han; Im, Sung Mo; Hwang, In Sung 66 2005 Hyponormal Toeplitz operators on the Bergman space. Zbl 1085.47027Hwang, In Sung 11 2005 Hyponormality of Toeplitz operators with polynomial and symmetric-type symbols. Zbl 1087.47027Hwang, In Sung; Lee, Woo Young 2 2004 Hyponormality of trigonometric Toeplitz operators. Zbl 1011.47023Hwang, In Sung; Lee, Woo Young 14 2002 Weak subnormality of operators. Zbl 1022.47013Curto, Raúl E.; Hwang, In Sung; Lee, Woo Young 2 2002 The boundedness below of \(2\times 2\) upper triangular operator matrices. Zbl 0986.47004Hwang, In Sung; Lee, Woo Young 33 2001 Hyponormality of Toeplitz operators with polynomial symbols: An extremal case. Zbl 1016.47024Hwang, In Sung; Kim, In Hyoun; Lee, Woo Young 7 2001 The spectrum is continuous on the set of \(p\)-hyponormal operators. Zbl 0963.47002Hwang, In Sung; Lee, Woo Young 11 2000 On spectral properties of log-hyponormal operators. Zbl 0968.47514Chō, Muneo; Hwang, In Sung; Lee, Jun Ik 1 2000 Hyponormality of Toeplitz operators with polynomial symbols. Zbl 0927.47018Hwang, In Sung; Kim, In Hyoun; Lee, Woo Young 14 1999 On the continuity of spectra of Toeplitz operators. Zbl 0910.47021Hwang, In Sung; Lee, Woo Young 4 1998 all cited Publications top 5 cited Publications all top 5 Cited by 158 Authors 22 Hwang, In Sung 21 Park, Choonkil 19 Eshaghi Gordji, Madjid 19 Lee, Woo Young 13 Chen, Alatancang 9 Cho, Yeol Je 9 Huang, Junjie 9 Khodaei, Hamid 8 Curto, Raúl Enrique 8 Lee, Jung-Rye 7 Kang, Dong-Oh 7 Ko, Eungil 7 Zhang, Shifang 6 Hai, Guojun 6 Lee, Jun Ik 6 Wu, Xiufeng 6 Zhong, Huaijie 5 Alizadeh, Zahra 5 Kim, An-Hyun 5 Saadati, Reza 4 Du, Hongke 4 Gu, Caixing 4 Jeon, In Ho 4 Kim, Hark-Mahn 4 Kim, In Hyoun 4 Lee, Jieun 4 Rassias, Themistocles Michael 4 Shin, Dong-Yun 3 Azadi-Kenary, Hassan 3 Bavand Savadkouhi, Meysam 3 Bodaghi, Abasalt 3 Duggal, Bhagwati Prashad 3 Ghaemi, Mohammad Bagher 3 Li, Yuan 3 Lu, Yufeng 3 Majani, Hamid 3 Najati, Abbas 3 Yang, Xiuzhong 2 Cao, Xiaohong 2 Cui, Puyu 2 Cvetković-Ilić, Dragana S. 2 Ghazanfari, Amir Ghasem 2 Hong, Kicheon 2 Jiang, Xiaoyu 2 Lee, Young-Su 2 Meng, Bin 2 Nakazi, Takahiko 2 Pang, Chin-Tzong 2 Pinelas, Sandra 2 Qi, Yaru 2 Shi, Yanyue 2 Sun, Xiuhong 2 Vaezpour, Seyyed Mansour 2 Wang, Zhihua 2 Zhao, Xiaopeng 2 Zolfaghari, Somayyeh 2 Zuo, Fei 1 Alias, Idham Arif 1 Alinejad, Ahmad 1 AlShehri, Adel 1 An, Il Ju 1 Askari, Gholamreza 1 Azadi Kenary, C. 1 Bahraini, Alireza 1 Bai, Qingmei 1 Barraa, Mohamed 1 Benharrat, Mohammed 1 Boumazgour, Mohamed 1 Bounader, Nordine 1 Chaipunya, Parin 1 Chang, Ick-Soon 1 Chang, Lidan 1 Chen, Xiaoling 1 Chung, Jaeyoung 1 Chung, Soon-Yeong 1 Djordjević, Slaviša V. 1 Dou, Yanni 1 Du, Guichun 1 Du, Qungui 1 Ebadian, Ali 1 El-Fassi, Iz-Iddine 1 Fei, Juntao 1 Fleeman, Matthew C. 1 Forti, Gian Luigi 1 Fu, Zunwei 1 Gao, Fugen 1 Garayev, Mübariz Tapdıgoğlu 1 Ghaffari, Ali 1 Ghahramani, Mohammad Hosein 1 Gholami, Reza 1 Gordij, Madjid Eshaghi 1 Govindan, Vediyappan 1 Guo, Maozheng 1 Halouani, Borhen 1 Han, Young Min 1 Hocine, Kouider Miloud 1 Jiang, Qiaofen 1 Jiang, Zhaolin 1 Ju, Yumin 1 Jung, Il Bong ...and 58 more Authors all top 5 Cited in 54 Serials 25 Journal of Mathematical Analysis and Applications 12 Abstract and Applied Analysis 12 Journal of Inequalities and Applications 10 Linear Algebra and its Applications 8 Advances in Difference Equations 6 Journal of Fixed Point Theory and Applications 5 Linear and Multilinear Algebra 5 Complex Analysis and Operator Theory 4 Integral Equations and Operator Theory 4 Results in Mathematics 4 Fixed Point Theory and Applications 4 Journal of Function Spaces 3 Journal of Functional Analysis 3 Mathematische Nachrichten 3 Acta Mathematica Sinica. English Series 3 Operators and Matrices 3 Annals of Functional Analysis 3 Mathematical Sciences 3 Korean Journal of Mathematics 2 Advances in Mathematics 2 Applied Mathematics Letters 2 Journal of Nonlinear Science and Applications 1 Journal of Mathematical Physics 1 Demonstratio Mathematica 1 Functional Analysis and its Applications 1 Glasgow Mathematical Journal 1 International Journal of Mathematics and Mathematical Sciences 1 Journal of the Korean Mathematical Society 1 Mathematische Annalen 1 Memoirs of the American Mathematical Society 1 Proceedings of the American Mathematical Society 1 Rendiconti del Circolo Matemàtico di Palermo. Serie II 1 Transactions of the American Mathematical Society 1 Bulletin of the Korean Mathematical Society 1 Acta Mathematica Hungarica 1 Acta Applicandae Mathematicae 1 Acta Mathematicae Applicatae Sinica. English Series 1 International Journal of Mathematics 1 Applied Mathematics. Series B (English Edition) 1 Mathematical Problems in Engineering 1 Honam Mathematical Journal 1 Discrete Dynamics in Nature and Society 1 Communications of the Korean Mathematical Society 1 Journal of Intelligent and Fuzzy Systems 1 Journal of Function Spaces and Applications 1 Boletim da Sociedade Paranaense de Matemática. Terceira Série 1 Complex Variables and Elliptic Equations 1 Proyecciones 1 Annali dell’Università di Ferrara. Sezione VII. Scienze Matematiche 1 Banach Journal of Mathematical Analysis 1 Analysis and Mathematical Physics 1 Arabian Journal of Mathematics 1 Journal of Applied Analysis and Computation 1 International Journal of Analysis and Applications all top 5 Cited in 19 Fields 101 Operator theory (47-XX) 66 Difference and functional equations (39-XX) 26 Functional analysis (46-XX) 11 Functions of a complex variable (30-XX) 5 Linear and multilinear algebra; matrix theory (15-XX) 3 Several complex variables and analytic spaces (32-XX) 3 Harmonic analysis on Euclidean spaces (42-XX) 3 Integral equations (45-XX) 2 Partial differential equations (35-XX) 2 Approximations and expansions (41-XX) 2 General topology (54-XX) 1 Number theory (11-XX) 1 Algebraic geometry (14-XX) 1 Potential theory (31-XX) 1 Abstract harmonic analysis (43-XX) 1 Numerical analysis (65-XX) 1 Mechanics of deformable solids (74-XX) 1 Game theory, economics, finance, and other social and behavioral sciences (91-XX) 1 Systems theory; control (93-XX) Citations by Year