Ko, Eungil; Lee, Ji Eun; Lee, Jongrak Hyponormal Toeplitz operators with non-harmonic symbols on the generalized derivative Hardy space. (English) Zbl 07648652 Mediterr. J. Math. 20, No. 1, Paper No. 3, 16 p. (2023). MSC: 47B35 47B20 30H15 PDFBibTeX XMLCite \textit{E. Ko} et al., Mediterr. J. Math. 20, No. 1, Paper No. 3, 16 p. (2023; Zbl 07648652) Full Text: DOI
Benhida, Chafiq; Chō, Muneo; Ko, Eungil; Lee, Ji Eun Characterizations of a complex symmetric truncated backward shift type operator matrix and its transforms. (English) Zbl 1522.47008 Result. Math. 78, No. 1, Paper No. 13, 18 p. (2023). MSC: 47A08 47B02 PDFBibTeX XMLCite \textit{C. Benhida} et al., Result. Math. 78, No. 1, Paper No. 13, 18 p. (2023; Zbl 1522.47008) Full Text: DOI
Ko, Eungil; Lee, Ji Eun; Lee, Jongrak \((m, C)\)-isometric Toeplitz operators with rational symbols. (English) Zbl 1517.47019 Linear Multilinear Algebra 70, No. 19, 4360-4376 (2022). MSC: 47A35 47A62 47B20 PDFBibTeX XMLCite \textit{E. Ko} et al., Linear Multilinear Algebra 70, No. 19, 4360--4376 (2022; Zbl 1517.47019) Full Text: DOI
Ko, Eungil; Lee, Ji Eun; Lee, Jongrak Complex symmetric Toeplitz operators on the weighted Bergman space. (English) Zbl 1517.47048 Complex Var. Elliptic Equ. 67, No. 6, 1393-1408 (2022). MSC: 47B35 47B15 47B20 30H20 PDFBibTeX XMLCite \textit{E. Ko} et al., Complex Var. Elliptic Equ. 67, No. 6, 1393--1408 (2022; Zbl 1517.47048) Full Text: DOI
An, Il Ju; Ko, Eungil; Lee, Ji Eun On local spectral properties of operator matrices. (English) Zbl 1495.47009 J. Inequal. Appl. 2021, Paper No. 164, 13 p. (2021). MSC: 47A08 47A11 47A15 47A53 PDFBibTeX XMLCite \textit{I. J. An} et al., J. Inequal. Appl. 2021, Paper No. 164, 13 p. (2021; Zbl 1495.47009) Full Text: DOI
Exner, George R.; Jin, Joo Young; Jung, Il Bong; Lee, Ji Eun Hamburger-type weighted shifts: jumping flatness and Aluthge transforms. (English) Zbl 1520.47067 J. Math. Anal. Appl. 494, No. 1, Article ID 124592, 16 p. (2021). Reviewer: Takeaki Yamazaki (Kawagoe) MSC: 47B37 44A60 PDFBibTeX XMLCite \textit{G. R. Exner} et al., J. Math. Anal. Appl. 494, No. 1, Article ID 124592, 16 p. (2021; Zbl 1520.47067) Full Text: DOI
An, Il Ju; Ko, Eungil; Lee, Ji Eun Operator matrices and their Weyl type theorems. (English) Zbl 1500.47007 Filomat 34, No. 10, 3191-3204 (2020). MSC: 47A08 47A10 47A53 PDFBibTeX XMLCite \textit{I. J. An} et al., Filomat 34, No. 10, 3191--3204 (2020; Zbl 1500.47007) Full Text: DOI
An, Il Ju; Ko, Eungil; Lee, Ji Eun Properties of operator matrices. (English) Zbl 07240929 J. Korean Math. Soc. 57, No. 4, 893-913 (2020). MSC: 47A53 47A55 47A10 47B40 PDFBibTeX XMLCite \textit{I. J. An} et al., J. Korean Math. Soc. 57, No. 4, 893--913 (2020; Zbl 07240929) Full Text: DOI
Benhida, Chafiq; Chō, Muneo; Ko, Eungil; Lee, Ji Eun On the generalized mean transforms of complex symmetric operators. (English) Zbl 1508.47033 Banach J. Math. Anal. 14, No. 3, 842-855 (2020). MSC: 47B25 47B37 PDFBibTeX XMLCite \textit{C. Benhida} et al., Banach J. Math. Anal. 14, No. 3, 842--855 (2020; Zbl 1508.47033) Full Text: DOI
Ko, Eungil; Lee, Ji Eun Remark on complex symmetric operator matrices. (English) Zbl 07046249 Linear Multilinear Algebra 67, No. 6, 1198-1216 (2019). MSC: 47A05 47B35 47B15 PDFBibTeX XMLCite \textit{E. Ko} and \textit{J. E. Lee}, Linear Multilinear Algebra 67, No. 6, 1198--1216 (2019; Zbl 07046249) Full Text: DOI
Gu, Caixing; Kang, Dong-O; Ko, Eungil; Lee, Ji Eun Binormal Toeplitz operators on the Hardy space. (English) Zbl 07029238 Int. J. Math. 30, No. 1, Article ID 1950001, 15 p. (2019). MSC: 47B35 47B15 47B20 PDFBibTeX XMLCite \textit{C. Gu} et al., Int. J. Math. 30, No. 1, Article ID 1950001, 15 p. (2019; Zbl 07029238) Full Text: DOI
Benhida, Chafiq; Chō, Muneo; Ko, Eungil; Lee, Ji Eun On symmetric and skew-symmetric operators. (English) Zbl 1484.47038 Filomat 32, No. 1, 293-303 (2018). MSC: 47B25 47A10 47A11 PDFBibTeX XMLCite \textit{C. Benhida} et al., Filomat 32, No. 1, 293--303 (2018; Zbl 1484.47038) Full Text: DOI
Chō, Muneo; Lee, Ji Eun; Tanahashi, Kôtarô; Tomiyama, Jun On \([m,C]\)-symmetric operators. (English) Zbl 07083930 Kyungpook Math. J. 58, No. 4, 637-650 (2018). MSC: 47A11 47B25 47B99 PDFBibTeX XMLCite \textit{M. Chō} et al., Kyungpook Math. J. 58, No. 4, 637--650 (2018; Zbl 07083930) Full Text: DOI
Ko, Eungil; Kwon, Hyun-Kyoung; Lee, Ji Eun A characterization of binormal matrices. (English) Zbl 1479.47008 Linear Multilinear Algebra 66, No. 6, 1215-1228 (2018). MSC: 47A08 15B05 PDFBibTeX XMLCite \textit{E. Ko} et al., Linear Multilinear Algebra 66, No. 6, 1215--1228 (2018; Zbl 1479.47008) Full Text: DOI
An, Il Ju; Ko, Eungil; Lee, Ji Eun Weyl type theorems for complex symmetric operator matrices. (English) Zbl 1484.47009 Filomat 31, No. 9, 2891-2900 (2017). MSC: 47A08 47A10 47A53 47A55 PDFBibTeX XMLCite \textit{I. J. An} et al., Filomat 31, No. 9, 2891--2900 (2017; Zbl 1484.47009) Full Text: DOI
Chō, Muneo; Lee, Ji Eun; Motoyoshi, Haruna On \([m, C]\)-isometric operators. (English) Zbl 1484.47011 Filomat 31, No. 7, 2073-2080 (2017). MSC: 47A11 47B01 47A80 PDFBibTeX XMLCite \textit{M. Chō} et al., Filomat 31, No. 7, 2073--2080 (2017; Zbl 1484.47011) Full Text: DOI
Ko, Eungil; Lee, Ji Eun On complex symmetric Toeplitz operators. (English) Zbl 1347.47019 J. Math. Anal. Appl. 434, No. 1, 20-34 (2016). Reviewer: Sen Zhu (Changchun) MSC: 47B35 PDFBibTeX XMLCite \textit{E. Ko} and \textit{J. E. Lee}, J. Math. Anal. Appl. 434, No. 1, 20--34 (2016; Zbl 1347.47019) Full Text: DOI
Ko, Eungil; Lee, Ji Eun Normal truncated Toeplitz operators on finite-dimensional spaces. (English) Zbl 1343.47039 Linear Multilinear Algebra 63, No. 10, 1947-1971 (2015). Reviewer: Adhemar Bultheel (Leuven) MSC: 47B35 47B15 PDFBibTeX XMLCite \textit{E. Ko} and \textit{J. E. Lee}, Linear Multilinear Algebra 63, No. 10, 1947--1971 (2015; Zbl 1343.47039) Full Text: DOI
Jung, Sungeun; Ko, Eungil; Lee, Ji Eun On complex symmetric operator matrices. (English) Zbl 1306.47024 J. Math. Anal. Appl. 406, No. 2, 373-385 (2013). MSC: 47A60 PDFBibTeX XMLCite \textit{S. Jung} et al., J. Math. Anal. Appl. 406, No. 2, 373--385 (2013; Zbl 1306.47024) Full Text: DOI
Jung, S.; Ko, E.; Lee, Mee-Jung; Lee, J. On local spectral properties of complex symmetric operators. (English) Zbl 1217.47013 J. Math. Anal. Appl. 379, No. 1, 325-333 (2011). MSC: 47A11 PDFBibTeX XMLCite \textit{S. Jung} et al., J. Math. Anal. Appl. 379, No. 1, 325--333 (2011; Zbl 1217.47013) Full Text: DOI