Jung, Sungeun Properties of \(J\)-self-adjoint operators. (English) Zbl 1507.47010 Oper. Matrices 15, No. 2, 627-644 (2021). MSC: 47A11 47A10 47B20 47B32 PDFBibTeX XMLCite \textit{S. Jung}, Oper. Matrices 15, No. 2, 627--644 (2021; Zbl 1507.47010) Full Text: DOI
Jung, Sungeun; Lee, Mee-Jung; Ko, Eungil On the iterated mean transforms of operators. (English) Zbl 1512.47040 Math. Inequal. Appl. 23, No. 2, 597-610 (2020). Reviewer: Hamza El Azhar (El Jadida) MSC: 47B20 47B37 PDFBibTeX XMLCite \textit{S. Jung} et al., Math. Inequal. Appl. 23, No. 2, 597--610 (2020; Zbl 1512.47040) Full Text: DOI
Jung, Sungeun; Ko, Eungil On analytic roots of hyponormal operators. (English) Zbl 06804295 Mediterr. J. Math. 14, No. 5, Paper No. 199, 18 p. (2017). MSC: 47B20 47A11 PDFBibTeX XMLCite \textit{S. Jung} and \textit{E. Ko}, Mediterr. J. Math. 14, No. 5, Paper No. 199, 18 p. (2017; Zbl 06804295) Full Text: DOI
Jung, Sungeun; Kim, Yoenha; Ko, Eungil Characterizations of binormal composition operators with linear fractional symbols on \(H^{2}\). (English) Zbl 1410.47004 Appl. Math. Comput. 261, 252-263 (2015). MSC: 47B20 47B33 PDFBibTeX XMLCite \textit{S. Jung} et al., Appl. Math. Comput. 261, 252--263 (2015; Zbl 1410.47004) Full Text: DOI
Jung, Sungeun; Ko, Eungil; Park, Shinhae Subscalarity of operator transforms. (English) Zbl 1357.47008 Math. Nachr. 288, No. 17-18, 2042-2056 (2015). Reviewer: Michal Zajac (Bratislava) MSC: 47A11 47A10 47B20 PDFBibTeX XMLCite \textit{S. Jung} et al., Math. Nachr. 288, No. 17--18, 2042--2056 (2015; Zbl 1357.47008) Full Text: DOI
Jung, Sungeun; Ko, Eungil Operator equations and subscalarity. (English) Zbl 1316.47019 Stud. Math. 225, No. 2, 97-113 (2014). MSC: 47A62 47B20 PDFBibTeX XMLCite \textit{S. Jung} and \textit{E. Ko}, Stud. Math. 225, No. 2, 97--113 (2014; Zbl 1316.47019) Full Text: DOI
Jung, Sungeun; Kim, Yoenha; Ko, Eungil; Lee, Ji Eun Complex symmetric weighted composition operators on \(H^2(\mathbb{D})\). (English) Zbl 1292.47014 J. Funct. Anal. 267, No. 2, 323-351 (2014); corrigendum ibid. 272, No. 11, 4870-4871 (2017). MSC: 47B33 47A16 PDFBibTeX XMLCite \textit{S. Jung} et al., J. Funct. Anal. 267, No. 2, 323--351 (2014; Zbl 1292.47014) 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
Ko, Eungil; Jung, Sungeun; Kim, Yoenha On subscalarity of some \(2 \times 2\) class \(A\) operator matrices. (English) Zbl 1272.47050 Linear Algebra Appl. 438, No. 3, 1322-1338 (2013). Reviewer: Vladimir S. Pilidi (Rostov-na-Donu) MSC: 47B99 47A15 PDFBibTeX XMLCite \textit{E. Ko} et al., Linear Algebra Appl. 438, No. 3, 1322--1338 (2013; Zbl 1272.47050) Full Text: DOI
Jung, Sungeun; Ko, Eungil; Lee, Ji Eun On scalar extensions and spectral decompositions of complex symmetric operators. (English) Zbl 1232.47021 J. Math. Anal. Appl. 384, No. 2, 252-260 (2011). Reviewer: Mihai Putinar (Santa Barbara) MSC: 47B20 47B40 47A11 PDFBibTeX XMLCite \textit{S. Jung} et al., J. Math. Anal. Appl. 384, No. 2, 252--260 (2011; Zbl 1232.47021) Full Text: DOI
Jung, Sungeun; Ko, Eungil; Lee, Mee-Jung Subscalarity of \((p,k)\)-quasihyponormal operators. (English) Zbl 1217.47041 J. Math. Anal. Appl. 380, No. 1, 76-86 (2011). MSC: 47B20 PDFBibTeX XMLCite \textit{S. Jung} et al., J. Math. Anal. Appl. 380, No. 1, 76--86 (2011; Zbl 1217.47041) 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