Edit Profile (opens in new tab) Cheung, Waishun Co-Author Distance Author ID: cheung.waishun Published as: Cheung, Wai-Shun; Cheung, Wai Shun; Cheung, Waishun more...less Documents Indexed: 27 Publications since 1996 Co-Authors: 15 Co-Authors with 20 Joint Publications 766 Co-Co-Authors all top 5 Co-Authors 7 single-authored 9 Li, Chi-Kwong 5 Ng, Tuen-Wai 4 Tam, Tin-Yau 2 Chan, Tsz Lung 1 Ching, Wai-Ki 1 Duffner, Maria Antónia 1 Fallat, Shaun M. 1 Liu, Xuhua 1 Olesky, D. Dale 1 Poon, Yiu-Tung 1 Rodman, Leiba X. 1 Tai, Allen H. 1 Tsang, Chiu Yin 1 Tsing, Nam-Kiu 1 van den Driessche, Pauline all top 5 Serials 9 Linear and Multilinear Algebra 3 Canadian Mathematical Bulletin 3 Linear Algebra and its Applications 2 Journal of the Australian Mathematical Society 2 Operators and Matrices 1 Journal of Mathematical Analysis and Applications 1 Journal of the London Mathematical Society. Second Series 1 Pacific Journal of Mathematics 1 Aequationes Mathematicae 1 European Journal of Operational Research 1 The Electronic Journal of Combinatorics 1 Taiwanese Journal of Mathematics 1 International Journal of Applied Mathematical Sciences all top 5 Fields 20 Linear and multilinear algebra; matrix theory (15-XX) 4 Operator theory (47-XX) 3 Combinatorics (05-XX) 3 Nonassociative rings and algebras (17-XX) 2 Associative rings and algebras (16-XX) 2 Topological groups, Lie groups (22-XX) 2 Functions of a complex variable (30-XX) 1 Numerical analysis (65-XX) 1 Computer science (68-XX) 1 Game theory, economics, finance, and other social and behavioral sciences (91-XX) Publications by Year all cited Publications top 5 cited Publications Citations contained in zbMATH Open 18 Publications have been cited 337 times in 274 Documents Cited by ▼ Year ▼ Lie derivations of triangular algebras. Zbl 1060.16033 Cheung, Wai-Shun 125 2003 Commuting maps of triangular algebras. Zbl 1014.16035 Cheung, Wai-Shun 123 2001 The \(C\)-numerical range of matrices is star-shaped. Zbl 0876.15021 Cheung, Wai-Shun; Tsing, Nam-Kiu 20 1996 Multiplicative preservers on semigroups of matrices. Zbl 1025.15001 Cheung, Wai-Shun; Fallat, Shaun; Li, Chi-Kwong 13 2002 A companion matrix approach to the study of zeros and critical points of a polynomial. Zbl 1095.15007 Cheung, Wai Shun; Ng, Tuen Wai 12 2006 Isometries between matrix algebras. Zbl 1078.15001 Cheung, Wai-Shun; Li, Chi-Kwong; Poon, Yiu-Tung 8 2004 Linear maps transforming the unitary group. Zbl 1034.15004 Cheung, Wai-Shun; Li, Chi-Kwong 7 2003 Linear operators preserving generalized numerical ranges and radii on certain triangular algebras of matrices. Zbl 0989.15011 Cheung, Wai-Shun; Li, Chi-Kwong 6 2001 A three-dimensional voting system in Hong Kong. Zbl 1338.91045 Cheung, Wai-Shun; Ng, Tuen-Wai 5 2014 Elementary proofs for some results on the circular symmetry of the numerical range. Zbl 1350.15012 Cheung, Wai-Shun; Li, Chi-Kwong 5 2013 Multiplicities, boundary points, and joint numerical ranges. Zbl 1213.15019 Cheung, Wai-Shun; Liu, Xuhua; Tam, Tin-Yau 3 2011 Multiplicative preservers and induced operators. Zbl 1072.15036 Cheung, Wai-Shun; Duffner, M. Antonia; Li, Chi-Kwong 2 2005 On the boundary of rank-\(k\) numerical ranges. Zbl 1305.15051 Cheung, Wai-Shun 2 2014 Operators with numerical range in a given closed half plane. Zbl 1136.47004 Cheung, Wai-Shun; Li, Chi-Kwong; Rodman, Leiba 2 2007 Optimizing quadratic forms of adjacency matrices of trees and related eigenvalue problems. Zbl 0981.15020 Cheung, Wai-Shun; Li, Chi-Kwong; Olesky, D. D.; van den Driessche, P. 1 2001 Graceful labeling for mushroom trees. Zbl 1317.05170 Chan, Tsz Lung; Cheung, Wai Shun; Ng, Tuen Wai 1 2015 Graceful tree conjecture for infinite trees. Zbl 1188.05110 Chan, Tsz Lung; Cheung, Wai Shun; Ng, Tuen Wai 1 2009 The \(K\)-orbit of a normal element in a complex semisimple Lie algebra. Zbl 1197.22001 Tam, Tin-Yau; Cheung, Wai-Shun 1 2008 Graceful labeling for mushroom trees. Zbl 1317.05170 Chan, Tsz Lung; Cheung, Wai Shun; Ng, Tuen Wai 1 2015 A three-dimensional voting system in Hong Kong. Zbl 1338.91045 Cheung, Wai-Shun; Ng, Tuen-Wai 5 2014 On the boundary of rank-\(k\) numerical ranges. Zbl 1305.15051 Cheung, Wai-Shun 2 2014 Elementary proofs for some results on the circular symmetry of the numerical range. Zbl 1350.15012 Cheung, Wai-Shun; Li, Chi-Kwong 5 2013 Multiplicities, boundary points, and joint numerical ranges. Zbl 1213.15019 Cheung, Wai-Shun; Liu, Xuhua; Tam, Tin-Yau 3 2011 Graceful tree conjecture for infinite trees. Zbl 1188.05110 Chan, Tsz Lung; Cheung, Wai Shun; Ng, Tuen Wai 1 2009 The \(K\)-orbit of a normal element in a complex semisimple Lie algebra. Zbl 1197.22001 Tam, Tin-Yau; Cheung, Wai-Shun 1 2008 Operators with numerical range in a given closed half plane. Zbl 1136.47004 Cheung, Wai-Shun; Li, Chi-Kwong; Rodman, Leiba 2 2007 A companion matrix approach to the study of zeros and critical points of a polynomial. Zbl 1095.15007 Cheung, Wai Shun; Ng, Tuen Wai 12 2006 Multiplicative preservers and induced operators. Zbl 1072.15036 Cheung, Wai-Shun; Duffner, M. Antonia; Li, Chi-Kwong 2 2005 Isometries between matrix algebras. Zbl 1078.15001 Cheung, Wai-Shun; Li, Chi-Kwong; Poon, Yiu-Tung 8 2004 Lie derivations of triangular algebras. Zbl 1060.16033 Cheung, Wai-Shun 125 2003 Linear maps transforming the unitary group. Zbl 1034.15004 Cheung, Wai-Shun; Li, Chi-Kwong 7 2003 Multiplicative preservers on semigroups of matrices. Zbl 1025.15001 Cheung, Wai-Shun; Fallat, Shaun; Li, Chi-Kwong 13 2002 Commuting maps of triangular algebras. Zbl 1014.16035 Cheung, Wai-Shun 123 2001 Linear operators preserving generalized numerical ranges and radii on certain triangular algebras of matrices. Zbl 0989.15011 Cheung, Wai-Shun; Li, Chi-Kwong 6 2001 Optimizing quadratic forms of adjacency matrices of trees and related eigenvalue problems. Zbl 0981.15020 Cheung, Wai-Shun; Li, Chi-Kwong; Olesky, D. D.; van den Driessche, P. 1 2001 The \(C\)-numerical range of matrices is star-shaped. Zbl 0876.15021 Cheung, Wai-Shun; Tsing, Nam-Kiu 20 1996 all cited Publications top 5 cited Publications all top 5 Cited by 265 Authors 21 Wang, Yu 20 Li, Chi-Kwong 18 Ashraf, Mohammad 15 Wei, Feng 13 Qi, Xiaofei 12 Benkovič, Dominik 10 Hou, Jinchuan 10 Xiao, Zhankui 9 Sze, Nung-Sing 9 Zhang, Jianhua 8 Akhtar, Mohd Shuaib 8 Fošner, Ajda 8 Lu, Fangyan 7 Ansari, Mohammad Afajal 7 Cheung, Waishun 7 Chooi, Wai-Leong 7 Jabeen, Aisha 6 Du, Yiqiu 6 Eremita, Daniel 6 Ghahramani, Hoger 6 Li, Changjing 6 Poon, Yiu-Tung 5 Liu, Cheng-Kai 4 An, Runling 4 Bahmani, Mohammad Ali 4 Bennis, Driss 4 Dirr, Gunther 4 Fang, Xiaochun 4 Guterman, Alexander Èmilevich 4 Ji, Peisheng 4 Jing, Wu 4 Liang, Xinfeng 4 Liu, Lei 4 Nakazato, Hiroshi 4 Ng, Tuen-Wai 4 Poon, Edward 4 Tan, Li Yin 4 Vishki, Hamid Reza Ebrahimi 4 Yu, Weiyan 3 An, Guangyu 3 Cao, Chongguang 3 Chen, Lin 3 Chen, Quanyuan 3 Chen, Zhengxin 3 Ferreira, Bruno Leonardo Macedo 3 He, Jun 3 Helmke, Uwe R. 3 Kong, Liang 3 Lau, Pan-Shun 3 Li, Yanbo 3 Parveen, Nazia 3 Rodman, Leiba X. 3 Šemrl, Peter 3 Tang, Xiaomin 3 Tsing, Nam-Kiu 3 Wang, Ting 3 Wang, Yao 3 Zhang, Xian 2 Ahmed, Driss Aiat Hadj 2 Akhter, Md Shamim 2 Bourhim, Abdellatif 2 Chien, Mao-Ting 2 Clark, Sean 2 Danielyan, S. V. 2 Diogo, Cristina 2 Fadaee, Behrooz 2 Fahid, Brahim 2 Gau, Hwa-Long 2 Ghomanjani, Fateme 2 Han, Dong 2 Khadem-Maboudi, Ali Akbar 2 Khan, Abdul Nadim 2 Khrypchenko, Mykola S. 2 Kurz, Sascha 2 Li, Jiankui 2 Lim, Ming-Huat 2 Mabrouk, Mohamed 2 Martín González, Cándido 2 Mokhtari, Amir Hosein 2 Mutalib, M. H. A. 2 Napel, Stefan 2 Pereira Soares, Maria da Graca 2 Qi, Weiqing 2 Sánchez Ortega, Juana 2 Schulte-Herbrüggen, Thomas 2 Spitkovsky, Ilya Matvey 2 Wani, Bilal Ahmad 2 Weis, Stephan 2 Yuan, He 2 Zhou, Jiren 1 Abbasi, Adnan 1 Abdaoui, Meher 1 Adm, Mohammad 1 Adrabi, Abderrahim 1 Ahmad, Musheer 1 Aiat Hadj, Driss Ahmed 1 Alwill, Michael 1 Attar, Azam Erfanian 1 Bai, Jie 1 Barootkoob, Sedigheh ...and 165 more Authors all top 5 Cited in 83 Serials 77 Linear Algebra and its Applications 45 Linear and Multilinear Algebra 10 Communications in Algebra 8 Bulletin of the Iranian Mathematical Society 8 Operators and Matrices 7 Aequationes Mathematicae 5 Journal of Mathematical Analysis and Applications 5 Acta Mathematica Sinica. English Series 3 Rocky Mountain Journal of Mathematics 3 Integral Equations and Operator Theory 3 Journal of Algebra 3 Proceedings of the American Mathematical Society 3 Quaestiones Mathematicae 3 Georgian Mathematical Journal 3 Bulletin of the Malaysian Mathematical Sciences Society. Second Series 3 Mediterranean Journal of Mathematics 3 Banach Journal of Mathematical Analysis 3 Open Mathematics 2 Applied Mathematics and Computation 2 Demonstratio Mathematica 2 Acta Mathematica Hungarica 2 European Journal of Operational Research 2 Proceedings of the Indian Academy of Sciences. Mathematical Sciences 2 ELA. The Electronic Journal of Linear Algebra 2 Abstract and Applied Analysis 2 Journal of the Australian Mathematical Society 2 Journal of Algebra and its Applications 2 Complex Analysis and Operator Theory 2 Special Matrices 2 Advances in Operator Theory 1 Bulletin of the Australian Mathematical Society 1 Indian Journal of Pure & Applied Mathematics 1 Israel Journal of Mathematics 1 Periodica Mathematica Hungarica 1 Studia Mathematica 1 Ukrainian Mathematical Journal 1 Beiträge zur Algebra und Geometrie 1 Acta Scientiarum Mathematicarum 1 Czechoslovak Mathematical Journal 1 Journal of Pure and Applied Algebra 1 Journal für die Reine und Angewandte Mathematik 1 Kyungpook Mathematical Journal 1 Monatshefte für Mathematik 1 Proceedings of the Edinburgh Mathematical Society. Series II 1 Rendiconti del Circolo Matemàtico di Palermo. Serie II 1 Results in Mathematics 1 Revista de la Unión Matemática Argentina 1 Ricerche di Matematica 1 Siberian Mathematical Journal 1 Transactions of the American Mathematical Society 1 Mathematical Social Sciences 1 SIAM Journal on Matrix Analysis and Applications 1 Expositiones Mathematicae 1 Journal of Mathematical Sciences (New York) 1 Filomat 1 Journal of Convex Analysis 1 Journal of Lie Theory 1 Electronic Journal of Probability 1 Arab Journal of Mathematical Sciences 1 Soft Computing 1 Communications of the Korean Mathematical Society 1 Annales Mathematicae Silesianae 1 Computational Methods and Function Theory 1 Boletim da Sociedade Paranaense de Matemática. Terceira Série 1 GAMM-Mitteilungen 1 Optimization Letters 1 Involve 1 Vestnik Samarskogo Gosudarstvennogo Tekhnicheskogo Universiteta. Seriya Fiziko-Matematicheskie Nauki 1 Acta Universitatis Sapientiae. Mathematica 1 Advances in Pure and Applied Mathematics 1 Revista de la Real Academia de Ciencias Exactas, Físicas y Naturales. Serie A: Matemáticas. RACSAM 1 Annals of Functional Analysis 1 Afrika Matematika 1 Communications in Mathematics 1 Palestine Journal of Mathematics 1 Communications in Mathematics and Statistics 1 Journal of Mathematics 1 Journal of Linear and Topological Algebra 1 Journal of Function Spaces 1 Khayyam Journal of Mathematics 1 Korean Journal of Mathematics 1 Bollettino dell’Unione Matematica Italiana 1 Journal of Algebraic Systems all top 5 Cited in 24 Fields 148 Associative rings and algebras (16-XX) 138 Operator theory (47-XX) 116 Linear and multilinear algebra; matrix theory (15-XX) 24 Nonassociative rings and algebras (17-XX) 22 Functional analysis (46-XX) 8 Functions of a complex variable (30-XX) 7 Quantum theory (81-XX) 6 Combinatorics (05-XX) 5 Real functions (26-XX) 4 Convex and discrete geometry (52-XX) 4 Operations research, mathematical programming (90-XX) 3 Probability theory and stochastic processes (60-XX) 3 Game theory, economics, finance, and other social and behavioral sciences (91-XX) 2 Group theory and generalizations (20-XX) 1 History and biography (01-XX) 1 Field theory and polynomials (12-XX) 1 Commutative algebra (13-XX) 1 Ordinary differential equations (34-XX) 1 Partial differential equations (35-XX) 1 Dynamical systems and ergodic theory (37-XX) 1 Geometry (51-XX) 1 Numerical analysis (65-XX) 1 Systems theory; control (93-XX) 1 Information and communication theory, circuits (94-XX) Citations by Year