• Complex symmetric weighted composition operators on H2(D)
  S. Jung, Y. Kim, E. Ko, J. E. Lee,
  Journal of Functional Analysis 267 (2014), 323–351.
  
  

• On complex symmetric Toeplitz operators
  E. Ko, J. E. Lee,
  Journal of Mathematical Analysis and Applications 434 (2016), 20–34.
  
  

• On local spectral properties of complex symmetric operators
  S. Jung, E. Ko, M. Lee, J. E. Lee,
  Journal of Mathematical Analysis and Applications 379 (2011), 325–333.
  
  

• On complex symmetric operator matrices
  S. Jung, E. Ko, J. E. Lee,
  Journal of Mathematical Analysis and Applications 406 (2013), 373–385.
  
  

• On (A,m)-expansive operators
  S. Jung, Y. Kim, E. Ko, J. E. Lee,
  Studia Mathematica 213 (2012), 3–23.
  
  

• On (m,C)-Isometric Commuting Tuples of Operators on a Hilbert Space

S. A. Mahmoud, M. Cho, J. E. Lee, 

Results in Mathematics 73 (2018). 

• On m-complex symmetric operators II
  M. Cho, E. Ko, J. E. Lee,
  Mediterranean Journal of Mathematics 13 (2016), Article 3255.
  
  

• On (m,C)-isometric operators
  M. Cho, E. Ko, J. E. Lee,
  Complex Analysis and Operator Theory 10 (2016), 1679–1694.
  
  

• On scalar extensions and spectral decompositions of complex symmetric operators
  S. Jung, E. Ko, J. E. Lee,
  Journal of Mathematical Analysis and Applications 384 (2011), 252–260.
  
  

• On properties of C-normal operators
  E. Ko, J. E. Lee, M. J. Lee,
  Banach Journal of Mathematical Analysis 15 (2021).
  
  

• A complete list of publications is available on my Google Scholar page. 

‪Ji Eun Lee(이지은)‬ - ‪Google 학술 검색‬ 

2026

• Local spectral properties on skew diagonal operator matrices
  E. Ko, J. E. Lee, M. J. Lee,
  Linear and Multilinear Algebra 74 (2026), no. 2, 166–181.
  
  

• On C-quasinormal operators
  E. Ko, J. E. Lee, M. J. Lee,
  Advances in Operator Theory 11 (2026).
  
  

2025

• Binormal block Toeplitz operators with matrix-valued circulant symbols
  N. G. Göğüş, R. Khan, E. Ko, J. E. Lee,
  Quaestiones Mathematicae 48 (2025), 1–19.
  
  

• Hyponormal Toeplitz operators on the Newton spaces
  E. Ko, J. E. Lee, J. Lee,
  Annals of Functional Analysis 16 (2025).
  
  

• Toeplitz operators on several function spaces: decompositions yielding subnormality
  B. Chafiq, E. George, J. E. Lee, L. Jongrak,
  Banach Journal of Mathematical Analysis 19 (2025).
  
  

• On C-hyponormal operators
  E. Ko, J. E. Lee, M. J. Lee,
  Journal of Mathematical Inequalities 19 (2025), 31–46.
  
  

• On m-expansive tuples of commuting operators on a Banach space
  M. Cho, H. Jo, J. E. Lee,
  Czech Mathematical Journal (2025).
  
  

2024

• On C-normal operator matrices
  E. Ko, J. E. Lee, M. J. Lee,
  Results in Mathematics 79 (2024).
  
  

• On m-complex self-adjoint operators
  M. Cho, J. E. Lee,
  Annals of Functional Analysis 15 (2024).
  
  

• H-Toeplitz operators on function spaces
  S. Kim, E. Ko, J. E. Lee, J. Lee,
  Monatshefte für Mathematik 205 (2024), 757–786.
  
  

• Matrix representation of Toeplitz operators on Newton spaces
  E. Ko, J. E. Lee, J. Lee,
  Journal of Inequalities and Applications 2024, Article 43.
  
  

• Expansivity and contractivity of Toeplitz operators on Newton spaces
  E. Ko, J. E. Lee, J. Lee,
  Mediterranean Journal of Mathematics 21 (2024).
  
  

• On the generalized Sylvester operator equation AX−YB=C
  I. J. An, E. Ko, J. E. Lee,
  Linear and Multilinear Algebra 72 (2024), 585–596.
  
  

• On generalization of expansive operators
  M. Cho, H. Jo, J. E. Lee,
  Mathematical Inequalities and Applications 27 (2024), 159–171.
  
  

2023

• Characterizations of Matrix-Valued Asymmetric Truncated Hankel Operators
  R. Khan, Ji Eun Lee
  Banach Journal of Mathematical Analysis (2023).
  
  

• Square Roots of Complex Symmetric Operators
  Moonnsun Jo, Eungil Ko, Ji Eun Lee
  Linear and Multilinear Algebra 71(18) (2023), 3013–3024.
  
  

• Remark on the Dilation of Truncated Toeplitz Operators
  Eungil Ko, Ji Eun Lee
  Filomat 37(26) (2023), 8765–8776.
  
  

• Fuzzy Real Weak Product and Its Nontrivial Examples: A New Approach
  T. Byun, Ji Eun Lee, Jin Hee Yoon
  Soft Computing 27(19) (2023), 13797–13811.
  
  

• Properties of Newton Polynomials and Toeplitz Operators on the Newton Spaces
  Eungil Ko, Ji Eun Lee, J. Lee
  Annals of Functional Analysis (2023).
  
  

• Computation of the Iterated Aluthge, Duggal, and Mean Transforms
  Min Woo Park, Ji Eun Lee
  Filomat 37(15) (2023), 4843–4856.
  
  

• Hankel and Toeplitz Operators, Block Matrices and Derivations
  Eungil Ko, R. Harte, Ji Eun Lee
  Filomat 37(10) (2023), 3091–3104.
  
  

• On Properties of C-Normal Operators II
  Eungil Ko, Ji Eun Lee, M. Lee
  Annals of Functional Analysis (2023).
  
  

• Hyponormal Toeplitz Operators with Non-Harmonic Symbols on the Generalized Derivative Hardy Space
  Eungil Ko, Ji Eun Lee, J. Lee
  Mediterranean Journal of Mathematics (2023).
  
  

• Characterizations of a Complex Symmetric Truncated Backward Shift Type Operator Matrix and Its Transforms
  C. Benhida, M. Cho, Eungil Ko, Ji Eun Lee
  Results in Mathematics (2023).
  
  

2022

• On (m,C)-Isometric Toeplitz Operators with Rational Symbols
  Eungil Ko, Ji Eun Lee, J. Lee
  Linear and Multilinear Algebra 70(19) (2022), 4360–4376.
  
  

• Remarks on Complex Symmetric Toeplitz Operators
  D. Kang, Eungil Ko, Ji Eun Lee
  Linear and Multilinear Algebra 70(18) (2022), 3466–3476.
  
  

• Remarks on Composition Operators on the Newton Space
  Eungil Ko, Ji Eun Lee, J. Lee
  Mediterranean Journal of Mathematics (2022).
  
  

• On Quasinormality of the Dilation of Truncated Toeplitz Operators
  Eungil Ko, Ji Eun Lee
  Mathematical Inequalities & Applications 25(3) (2022), 679–690.
  
  

• Complex Symmetric Toeplitz Operators on the Generalized Derivative Hardy Space
  Eungil Ko, Ji Eun Lee, J. Lee
  Journal of Inequalities and Applications (2022).
  
  

• Complex Symmetric Toeplitz Operators on the Weighted Bergman Space
  Eungil Ko, Ji Eun Lee, J. Lee
  Complex Variables and Elliptic Equations 67(6) (2022), 1393–1408.
  
  

• On Backward Aluthge Iterates of Complex Symmetric Operators
  Eungil Ko, Ji Eun Lee, M. Lee
  Mathematical Inequalities & Applications 25(2) (2022), 379–395.
  
  

• Delta Root: A New Definition of a Square Root of Fuzzy Real Numbers
  T. Byun, Ji Eun Lee, Jin Hee Yoon
  Soft Computing 26(9) (2022), 4163–4169.
  
  

• Conjugations and Complex Symmetric Block Toeplitz Operators on the Weighted Hardy Space
  Eungil Ko, Ji Eun Lee, J. Lee
  Revista de la Real Academia de Ciencias Exactas, Físicas y Naturales. Serie A – Matemáticas (RACSAM) (2022).
  
  

2021

• Numerical Ranges of Conjugations and Antilinear Operators on a Banach Space
  M. Cho, Her In Jo, Ji Eun Lee
  Filomat 35(8) (2021), 2715–2720.
  
  

• Numerical Ranges of Conjugations and Antilinear Operators
  Her In Jo, Ji Eun Lee
  Linear and Multilinear Algebra 69(16) (2021), 2990–2997.
  
  

• Hyponormality of the Dilation of Truncated Toeplitz Operators
  Eungil Ko, Ji Eun Lee, T. Nakazi
  Complex Variables and Elliptic Equations 66(10) (2021), 1664–1675.
  
  

• On Local Spectral Properties of Operator Matrices
  I. An, Eungil Ko, Ji Eun Lee
  Journal of Inequalities and Applications (2021).
  
  

• On Properties of C-Normal Operators
  Eungil Ko, Ji Eun Lee, M. Lee
  Banach Journal of Mathematical Analysis (2021).
  
  

• On Quasinormality of Singular Integral Operators with Cauchy Kernel on L^2
  Eungil Ko, Ji Eun Lee
  Journal of Integral Equations and Applications 33(1) (2021), 77–89.
  
  

• Conjugations and Complex Symmetric Toeplitz Operators on the Weighted Hardy Space
  Eungil Ko, Ji Eun Lee, J. Lee
  Mediterranean Journal of Mathematics 18(4) (2021), 125.
  
  

• On the Single-Valued Extension Property of Hyponormal Operators on Banach Spaces
  M. Cho, Her In Jo, Ji Eun Lee
  Mediterranean Journal of Mathematics 18(1) (2021), 34.
  
  

• Hamburger-Type Weighted Shifts: Jumping Flatness and Aluthge Transforms
  G. R. Exner, J. Y. Jin, I. B. Jung, Ji Eun Lee
  Journal of Mathematical Analysis and Applications 494(1) (2021), 124592.