Curriculum Vitae

ASSOCIATE PROF. DR. CHOOI WAI LEONG

Associate Professor
  • Institute of Mathematical Sciences
    Faculty of Science
  • wlchooi
  • 0379674332

ACADEMIC QUALIFICATION

  • Post-Doctoral Research Fellowship, (Linear and Multilinear Algebra)
    University of Lisbon, Portugal
  • PhD(UM)(2001), (LINEAR & MULTILINEAR ALGEBRA)
    Universiti Malaya (um)
  • MSc(UM)(1996), (LINEAR ALGEBRA)
    Universiti Malaya (um)
  • BSc(Hons)(UM)(1994), (Mathematics)
    Universiti Malaya (um)

AWARD AND STEWARDSHIP

  • Certificate of Excellent Service
    2021, Universiti Malaya
  • Adjunct Associate Professor in School of Mathematical Sciences, Sunway University, Malaysia
    2019, Sunway University, Malaysia,  (National)
  • Excellence Service Award
    2015, Universiti Malaya
  • Seoul Icm2014 Nanum 2014 Travel Grants Award
    2014, The International Congress of Mathematician 2014,  (International)
  • Ambassador of The 2014 International Congress of Mathematicians Icm2014
    2013, The International Congress of Mathematicians 2014,  (International)
  • Excellence Service Award
    2012, Universiti Malaya
  • Certificate of Excellent Service
    2011, Universiti Malaya
  • Sijil Perkhidmatan Cemerlang 2010
    2011, University of Malaya,  (University)

PUBLICATIONS

Article in Journal
WoS
  1. Chooi, Wai Leong; Chua, Chin Yie (2025). Strong commutativity preserving maps on rank k strictly triangular matrices, LINEAR & MULTILINEAR ALGEBRA. . doi:10.1080/03081087.2024.2404445
  2. Chooi, Wai Leong; Tan, Li Yin; Tan, Yean Nee (2025). STRONG COMMUTATIVITY PRESERVING ADDITIVE MAPS ON INVERTIBLE TRIANGULAR MATRICES OVER F2, OPERATORS AND MATRICES. 19(1), 101-124. doi:10.7153/oam-2025-19-07
  3. Chooi, Wai leong; Lau, Jinting (2025). DERIVATIONS ON RANK K TRIANGULAR MATRICES, ELECTRONIC JOURNAL OF LINEAR ALGEBRA. 41, 86-99
  4. Chooi, Wai Leong; Lau, Jinting (2024). Adjacency preserving maps on symmetric tensors, LINEAR ALGEBRA AND ITS APPLICATIONS. 690, 27-58. doi:10.1016/j.laa.2024.02.029
  5. Chooi, Wai Leong; Lau, Jinting; Lim, Ming Huat (2024). Adjacency preserving maps between tensor spaces, LINEAR ALGEBRA AND ITS APPLICATIONS. 694, 307-334. doi:10.1016/j.laa.2024.04.018
  6. Chooi, Wai Leong; Tan, Li Yin; Tan, Yean Nee (2024). Strong commutativity preserving additive maps on rank k triangular matrices, LINEAR & MULTILINEAR ALGEBRA. . doi:10.1080/03081087.2022.2146042
  7. Chooi, Wai Leong; Wong, Jian Yong (2022). Commuting additive maps on tensor products of matrices, LINEAR & MULTILINEAR ALGEBRA. . doi:10.1080/03081087.2021.1920876
  8. Chooi, W. L., Mutalib, M. H. A., & Tan, L. Y. (2021). Commuting maps on rank one triangular matrices. Linear Algebra and Its Applications, 626, 34-55. doi: 10.1016/j.laa.2021.05.014
  9. Chooi, Wai Leong; Tan, Yean Nee (2021). A NOTE ON COMMUTING ADDITIVE MAPS ON RANK K SYMMETRIC MATRICES, ELECTRONIC JOURNAL OF LINEAR ALGEBRA. 37, 734-746
  10. Chooi, W. L., & Kwa, K. (2020). Classical adjoint commuting and determinant preserving linear maps on Kronecker products of Hermitian matrices. Linear & Multilinear Algebra, 68(5), 869-885. doi: 10.1080/03081087.2018.1519010
  11. Chooi, W. L., & Kwa, K. H. (2020). ADDITIVE MAPS ON RANK K BIVECTORS. Electronic Journal of Linear Algebra, 36, 847-856.
  12. Chooi, W. L., Kwa, K. H., & Tan, L. (2020). Commuting maps on rank k triangular matrices. Linear & Multilinear Algebra, 68(5), 1021-1030. doi: 10.1080/03081087.2018.1527281
  13. Chooi, W. L., Kwa, K. H. (2019). Additive maps of rank r tensors and symmetric tensors. Linear Multilinear Algebra, 67(6), 1269-1293. doi:10.1080/03081087.2018.1451477
  14. Chooi, W. L., Kwa, K. H., Tan, L. Y. (2019). Commuting maps on invertible triangular matrices over F-2. Linear Algebra and Its Applications, 583, 77-101. doi:10.1016/j.laa.2019.08.023
  15. Chooi, W. L., Kwa, K. H., Lim, M. H. (2017). Coherence invariant maps on tensor products. Linear Algebra and Its Applications, 516, 24-46.
  16. Chooi, Wai Leong; Kwa, Kiam Heong; Lau, Jinting (2016). A note on classical adjoint commuting linear maps of tensor products of matrices, LINEAR & MULTILINEAR ALGEBRA. 64(4), 745-766. doi:10.1080/03081087.2015.1120703
  17. Chooi, W. L., Ng, W. S. (2014). CLASSICAL ADJOINT COMMUTING MAPPINGS ON ALTERNATE MATRICES AND SKEW-HERMITIAN MATRICES, Operators and Matrices. 8(2), 485-512
  18. Chooi, W. L.; Kwa, K. H.; Lim, M. H.; Ng, Z. C. (2014). LINEAR SPACES AND PRESERVERS OF BOUNDED RANK-TWO PER-SYMMETRIC TRIANGULAR MATRICES, ELECTRONIC JOURNAL OF LINEAR ALGEBRA. 27, 619-651. doi:10.13001/1081-3810.1922
  19. Chooi, W. L., Lim, M. H., Ng, Z. C. (2013). Linear spaces and preservers of symmetric matrices of bounded rank-two, Linear Multilinear Algebra. 61(8), 1051-1062
  20. Chooi, W. L. (2011). COMPOUND-COMMUTING ADDITIVE MAPS ON MATRIX SPACES, Journal of the Korean Mathematical Society. 481(83-104), Article
  21. Chooi, W. L., Ng, W. S. (2011). Classical adjoint-commuting mappings on Hermitian and symmetric matrices, Linear Algebra and Its Applications. 4352(202-223), Article
  22. Chooi, W. L. (2010). Rank-one non-increasing additive maps between block triangular matrix algebras, Linear Multilinear Algebra. 58(6), 715-740
  23. Chooi, W. L., Ng, W. S. (2010). On classical adjoint-commuting mappings between matrix algebras, Linear Algebra and Its Applications. 432(10), 2589-2599
  24. Chooi, W. L., Lim, M. H. (2006). Additive rank-one preservers on block triangular matrix spaces, Linear Algebra and Its Applications. 416(2-3), 588-607
  25. Chooi, W. L., Lim, M. H. (2005). Additive preservers of rank-additivity on matrix spaces, Linear Algebra and Its Applications. 402, 291-302
Scopus
  1. Chooi W.L., Tan L.Y., Tan Y.N. (2023). On centralizing additive maps on rank one triangular matrices over division rings, Advances in Operator Theory. 8(4). doi:10.1007/s43036-023-00298-2
Others
  1. Chooi W.L., Wong J.Y. (2021). Commuting additive maps on tensor products of matrices, Linear and Multilinear Algebra, to appear, https://doi.org/10.1080/03081087.2021.1920876.
  2. Chooi, W.L., Mutalib, M.H.A., Tan, L.Y. (2021). Centralizing additive maps on rank r block triangular matrices. Acta Scientiarum Mathematicarum (Szeged), 87, 63-94.
  3. Chooi, W. L., Kwa, K. H., & Tan, L. Y. (2019). Commuting maps on invertible triangular matrices over F_2. Linear Algebra and its Applications, 583, 77-101.
  4. Chooi, W.L. (2010). Rank-one nonincreasing additive maps between block triangular matrix algebras. Linear and Multilinear Algebra, 58(6), 715-740.
  5. Chooi, W.L., & Lim, M.H. Lim (2004). Additive preservers of rank-additivity on matrix spaces. Journal of Natural Science of Heilongjiang University, 21(4), 46-49.
  6. Chooi, W.L., & Lim, M.H. (2003), Some linear preserver problems on block triangular matrix algebras. Linear Algebra and its Applications, 370(1), 25-39.
  7. Chooi, W.L., Lim, M.H., & Semrl, P. (2003). Adjacency preserving maps on upper triangular matrix algebras. Linear Algebra and its Applications, 367(1), 105-130.
  8. Chooi, W. L., & Lim, M. H. (2002), Coherence invariant mappings on block triangular matrix spaces. Linear Algebra and its Applications, 346(1-3), 199-238.
  9. Chooi, W. L., & Lim, M. H. (2002), Rank-one nonincreasing mappings on triangular matrices and some related preserver problems. Linear and Multilinear Algebra, 49(4), 305-336.
  10. Chooi, W.L., & Lim, M.H. (1998), Linear preservers on triangular matrices. Linear Algebra and its Applications, 269(1-3), 241-255.
Chapter in Books
  1. W.L. Chooi (2006), Calclulus of one variable, Engineering Mathematics I, 2nd Edition, 1-220. Pearson Prentice Hall (ISBN:978-983-3655-15-1)
  2. W.L. Chooi (2006), Complex Variables, Engineering Mathematics II, 2nd Edition, 385-652, Pearson Prentice Hall (ISBN:978-983-3655-16-8).
  3. W.L. Chooi (2006), Complex numbers and elementary functions, Engineering Mathematics I, 2nd Edition, 237- 286. Pearson Prentice Hall (ISBN:978-983-3655-15-1).
Article in Proceeding
  1. W.L. Chooi and M.H. Lim (2002), Rank-one nonincreasing linear maps on block triangular matrix algebras, Proceeding of 10-th National Mathematical Sciences Symposium, 72-78, Johor Baharu, Malaysia.
  2. W.L. Chooi and M.H. Lim (1996), Product preserving linear transformations on matrix spaces, Proceeding of the 7th National Mathematical Sciences Symposium, 312- 318, Kuala Lumpur, Malaysia.
Other Publications
  1. W.L. Chooi (2009), Compound-commuting additive maps between square matrix, 5-th IMT-GT International Conference on Mathematics, Statistics and their Applications (ICMSA) 2009, June 9- 11, 2009, West Sumatera, Indonesia. - Extended Abstract
  2. W.L. Chooi (2008), Adjugate-commuting additive maps on triangular matrices over an arbitrary field, One Day Seminar in Mathematics UM 2008, July 1, 2008, Institute of Mathematical Sciences, University of Malaya. - Extended Abstract
  3. W.L. Chooi (2008), Rank-one nonincreasing additive maps between block triangular matrix algebars, 8-th International Conference on Matrix Theory and its Applications (ICMTA 2008), July 16-18, 2008, Taiyuan Normal University, China. - Extended Abstract
  4. W.L. Chooi (2007), Additive rank-one preservers on triangular matrices, Invited talk, 3rd International Mathematics and Physical Sciences Graduate Congress 2007 (MPSGC 2007), December 12-14, 2007, University of Malaya, Malaysia. - Extended Abstract
  5. W.L. Chooi and M.H. Lim (2007), Additive mappings preserving rank-additivity on block triangular matrix algebras, 3rd IMT-GT Regional Conference on Mathematics, Statistics and Applications (IMT-GT-RCMSA 2007), December 5-6, 2007, Penang, Malaysia. - Extended Abstract
  6. W.L. Chooi and M.H. Lim (2001), Coherence invariant mappings on block triangular matrices, the 9-th International Linear Algebra Society Conference, June 25-29, 2001, Institute of Advanced Studies in Mathematics, Technion-Israel Institute of Technology, Haifa, Israel. - Extended Abstract
  7. W.L. Chooi (2000), Compound-commuting linear mappings on matrices, The 7-th SIAM Conference on Applied Linear Algebra, October 23 C 26, 2000, Jane S. McKimmon Conference Center, North Carolina State University, Raleigh, North Carolina. - Extended Abstract
  8. W.L. Chooi (1999), Adjugate-commuting maps on triangular matrices, The 8-th International Linear Algebra Society Conference, July 19-22, 1999. Escola Tecnica Superior d Enginyers Industrials, ETSEIB-UPC, Barcelona, Spain. - Extended Abstract

RESEARCH INTEREST

  • Linear Preserver Problems (linear maps, additive maps, ranks, tensors, matrices)
  • Geometry of Matrices (adjacency, ranks, tensors, matrices)
  • Functional Identities (commuting maps, ranks, tensors, matrices)

RESEARCH PROJECT

National
  1. 2018 - 2021, RU Operation
    Some Preserver Problems on Tensor Products related to Functional Identities ( Principal Investigator(PI))
  2. 2011 - 2014, Geran Penyelidikan Universiti Malaya (UMRG)
    Nonlinear Preserver Problems on Matrix and Tensor Spaces ( Principal Investigator(PI))
  3. 2008 - 2011, Fundamental Research Grant Scheme (FRGS)
    Additive Preserver Problems on Matrix Spaces and its Applications ( Principal Investigator(PI))
  4. 2007 - 2009, ScienceFund
    Preserver Problems on Spaces of Matrices or Operators and their Applications ( Principal Investigator(PI))
  5. 2008 - 2009, Short Term Research Fund (Vote F)(PJP)
    Operators on matrices with invariance of lie products ( Principal Investigator(PI))
  6. 2002 - 2004, IRPA (MOSTI)
    Linear preserver problems on spaces of matrices or operators ( Principal Investigator(PI))
International
  1. 2018 - 2021, Fundamental Research Grant Scheme (FRGS)
    Preserver Problems on Tensor Products related to Quantum Information Sciences ( Principal Investigator(PI))
University
  1. 2007 - 2008, Short Term Research Fund (Vote F)(PJP)
    Some Studies on Preserver Problems on Triangular Matrices ( Principal Investigator(PI))

PAPER PRESENTED

PLENARY SPEAKER
  1. Linear Preserver Problems and their Recent Developments, The 11-th IMT-GT International Conference on Mathematics, Statistics and its Applications 2015, ICMSA2015, King Mongkut's Institute of Technology Ladkrabang (International) (23 Nov 2015 - 25 Nov 2015)
INVITED SPEAKER
  1. Some recent developments in the study of geometry of matrices, the 22-nd National Symposium Mathematical Sciences SKSM22, Institute of Mathematical Sciences and PERSAMA (National) (24 Nov 2014 - 26 Nov 2014)
  2. Some studies on the geometry of block triangular matrices, The 6-th International Workshop on Matrices and Operators (MAO2011), College of William and Mary (USA) and University of Electronic Science and Technology of China (China) (International) (08 Jul 2011 - 11 Jul 2011)
  3. Classical adjoint commuting mappings on Hermitian and symmetric matrices, The Fifth Workshop on Matrices and Operators, Shanxi Association for Science and Technology, Taiyuan University of Technology and Shanxi Normal University (International) (11 Jul 2010 - 15 Jul 2010)
  4. Additive rank-one preservers on triangular matrices, Invited Speaker, The 3rd Mathematics and Physical Sciences International Graduates Congress, University of Malaya. (International) (12 Dec 2007 - 14 Dec 2007)
  5. Additive mapping persevering rank-additivity on matrix spaces , Invited Speaker, The 6-th International Conference on Matrix Theory and its Applications 2004.  (International) (01 Jul 2004 - 04 Jul 2004)
EVENT ORGANISER
  1. A characterization of surjective classical adjoint commuting maps on matrix algebras, Seminar in Mathematical Sciences 2009, Insitute of Mathematical Sciences, University of Malaya (National) (30 Oct 2009 - 01 Nov 2009)
ORAL PRESENTER
  1. Linear spaces and preservers of bounded rank-two per-symmetric triangular matrices, 19-th Conference of the International Linear Algebra Society ILAS2014 - Contributed Minisymposia in Recent Developments in Linear Preserver Problems, International Linear Algebra Society ILAS  (International) (06 Aug 2014 - 09 Aug 2014)
  2. Bounded distance preserving surjective mappings on block triangular matrix algebras, The Asian Mathematical Conference 2013, Korean Mathematical Society and Southeast Asian Mathematical Society (International) (30 Jun 2013 - 04 Jul 2013)
  3. Bounded distance preserving surjective mappings on triangular matrices, International Conference on Rings and Algebas, Kent State University (USA), National Taiwan University (Taiwan) and National Cheng Kung University (Taiwan) (International) (10 Jul 2011 - 16 Jul 2011)
PRESENTER
  1. On classical ajoint commuting mapping between matrix algebras, The 16th Conference of the International Linear Algebra Society, Internatioal Linear Algebra Society, University of Pisa (International) (21 Jun 2010 - 25 Jun 2010)
  2. Rank-one preserving additive mappings on triangular matrices, International Workshop on Preserver Problems, May 5 7 2005, University of Hong Kong, Hong Kong. , University of Hong Kong (International) (05 May 2005 - 07 May 2005)
  3. Geometry of triangular matrices, Centro de Estruturas Lineares e Combinotorias CLEC Seminorio, Complexo Interdisciplinar, June 17 2002, University of Lisboa, Portugal. , University of Lisboa, Portugal.  (University) (17 Jun 2002 - 17 Jun 2002)

ACADEMIC/ PROF. SERVICES

Evaluation
  1. (2022) Panel to Evaluate Candidate Deference for Msc Program: "galois Groups and Solutions of Certain Solvable Polynomials", University, (Internal Examiner)
  2. (2022) Panel to Evaluate Proposal Defence for Msc Program "galois Groups and Solutions of Certain Solvable Polynomials", University, (Reviewer)
  3. (2021) External Examiner for Mphil Thesis of The Hong Kong Polytechnic University, Hong Kong, International, (External Examiner)
  4. (2021) The 28th National Symposium On Mathematical Sciences (sksm28), National, (Reviewer)
  5. (2021) Linear Preservers of Matrices Over a Class of Semirings, International, (Reviewer)
  6. (2020) Review research article/manuscript submitted to Linear and Multilinear Algebra (International Mathematical Journal) - International Level , (Reviewer)
  7. (2020) Review research article/manuscript submitted to Advances of Operator Theory (International Mathematical Journal) - International Level , (Reviewer)
  8. (2019) Penal Penilai Skim Geran Penyelidikan Fundamental (FRGS) Fasa 1/2019 , (Assessor)
  9. (2019) Auditor Dalaman bagi Audit Kendiri Fakulti Sains 2019 , (UM Fakulti Sains Internal Auditor)
  10. (2018) As a review panel to review the proceeding papers submitted to the 4th ISM International Statistical Conference 2018 (ISM-IV) for the consideration of publication., (Reviewer)
  11. (2006) As a scholar in linear and multilinear algebra, we are invited to review manuscripts (related to linear algebra and matrix theory) submitted to Malaysian Journal of Science for publication. , (Reviewer)
  12. (2001) As a scholar in linear and multilinear algebra, we will be invited to review manuscript submitted to Linear Multilinear Algebra for a possible publication. , (Reviewer)
  13. (2000) As a scholar in linear and multilinear algebra, we will be invited to review manuscript submitted to Linear Algebra and its Applications for a possible publication. , (Reviewer)
Contribution to event
  1. (2021) Mentor/speaker for E-clinic Program On How to Write Thesis Introduction, Bibliography and Literature Review, University, (Event Coordinator)

SUPERVISION

Postgraduate Student
PhD/ Doctoral
  1. (2024) Strong Commutativity Preserving Additive Maps and Some Related Maps on Triangular and Symmetric Matrices, TAN YEAN NEE
  2. (2022) Commuting Additive Maps and Some Related Maps on Triangular Matrices, TAN LI YIN
  3. (2020) SOME PRESERVER PROBLEMS ON GRASSMANNIANS, Lau Jin Ting
  4. (2018) SOME ADDITIVE PRESERVERS ON MATRIX SPACES, TAN YEAN NEE
  5. (2017) COMMUTING AND SOME RELATED ADDITIVE MAPS ON UPPER TRIANGULAR MATRICES, TAN LI YIN
  6. (2015) GENERALISED CLASSICAL ADJOINT-COMMUTING MAPPINGS ON MATRIX SPACES, NG WEI SHEAN
  7. (2008) GENERALISED CLASSICAL ADJOINT-COMMUTING MAPPINGS ON MATRIX SPACES, NG WEI SHEAN
Master
  1. (2024) STRONG COMMUTATIVITY PRESERVING ADDITIVE MAPS ON STRICTLY UPPER TRIANGULAR MATRICES, CHUA CHIN YIE
  2. (2020) COMMUTING ADDITIVE MAPS ON TENSOR PRODUCTS OF MATRIX ALGEBRAS, WONG JIAN YONG
  3. (2020) CENTRALIZING ADDITIVE MAPS ON RANK R BLOCK TRIANGULAR MATRICES, MUHAMMAD HAZIM BIN ABDUL MUTALIB
  4. (2018) COMMUTING ADDITIVE MAPS ON TENSOR PRODUCTS OF MATRIX ALGEBRAS, WONG JIAN YONG
  5. (2018) CENTRALIZING ADDITIVE MAPS ON RANK R BLOCK TRIANGULAR MATRICES, MUHAMMAD HAZIM BIN ABDUL MUTALIB
  6. (2015) Some Linear Preserver Problems on Tensor Products of Matrices, LAU JIN TING
  7. (2014) Some Linear Preserver Problems on Tensor Products of Matrices, LAU JIN TING
  8. (2013) RANK LINEAR PRESERVERS ON TRIANGULAR MATRICES, AHMAD FAIZOL BIN ROSELI
  9. (2011) LINEAR SPACES AND PRESERVERS OF PERSYMMETRIC TRIANGULAR MATRICES OF BOUNDED RANK-TWO, NG ZHEN CHUAN
  10. (2011) LINEAR SPACES AND PRESERVERS OF PERSYMMETRIC TRIANGULAR MATRICES OF BOUNDED RANK-TWO, NG ZHEN CHUAN
Under Graduate Students
  1. (2024) SIQ3007 Latihan Industri Aktuari Sains SEMESTER II, 2023/2024
  2. (2023) Industrial Training, UMU KALTHUM BT ABD LATIP, YEOW ZHONG HONG
  3. (2022) RANK ONE LINEAR PRESERVERS OF TENSOR PRODUCTS
  4. (2022) ADJACENCY PRESERVING MAPS OF TENSOR PRODUCTS
  5. (2022) Industrial Training, Muhammad Najmi bin Hazlan
  6. (2021) A Study of Jordan Canonical Forms of Linear Operators
  7. (2021) A study of additive maps on real invertible matrices
  8. (2019) A Study of Functional Identities on Matrices
  9. (2017) STUDIES ON POSITIVE SEMIDEFINITE MATRICES
  10. (2016) Some Classes of Linear Operators on Inner Product Spaces

TEACHING

Bachelor
  1. (2024) SIM2002 - Linear Algebra
  2. (2024) SIM3005 - Matrix Theory
  3. (2023) SIM2006 - Complex Variables
  4. (2023) SIM2002 - Linear Algebra
  5. (2022) SIM3004 - Advanced Linear Algebra
  6. (2022) SIM2002 - Linear Algebra
  7. (2022) SIM3005 - Matrix Theory
  8. (2021) SIM2002 - Linear Algebra
  9. (2021) SIM3005 - Matrix Theory
  10. (2021) SIM2002 - Linear Algebra
  11. (2021) SIM3005 - Matrix Theory
  12. (2020) SIM3004 - Advanced Linear Algebra
  13. (2020) SIM2002 - Linear Algebra
  14. (2020) SIM2002 - Linear Algebra
  15. (2020) SIM3004 - Advanced Linear Algebra
  16. (2020) SIM3004 - Advanced Linear Algebra
  17. (2019) SIM2002 - Linear Algebra
  18. (2019) SIM2006 - Complex Variables
  19. (2019) SIM3005 - Matrix Theory
  20. (2019) SJEM3415 - Matrix Theory
  21. (2018) SIM2002 - Linear Algebra
  22. (2018) SIM3005 - Matrix Theory
  23. (2018) SJEM2215 - Complex Variables

SOCIAL RESPONSIBILITY ACTIVITIES

  • Committee Members of Universiti Malaya Competition for Young Mathematicians (umcym) for Years 2016, 2017, 2018 and 2019, (01 May 2016 - 17 Aug 2019) (National)
  • Penganjur Sesi Mini Simposium Pada Simposium Kebangsaan Sains Metematik Ke-22 Di Hotel Grand Bluewave, Shah Alam, Selangor Malaysia, 24-26 November 2014., (24 Nov 2014 - 26 Nov 2014)
  • Ambassador of The 2014 International Congress of Mathematicians (icm2014) and Its Invitition Program Nanum2014, (01 Jan 2013 - 01 Aug 2014)