Lee, Jae Won; Jeon, In Ho Riesz projections for a non-hyponormal operator. (English) Zbl 1439.47004 Korean J. Math. 24, No. 1, 65-70 (2016). MSC: 47A10 47B02 47B20 PDFBibTeX XMLCite \textit{J. W. Lee} and \textit{I. H. Jeon}, Korean J. Math. 24, No. 1, 65--70 (2016; Zbl 1439.47004) Full Text: DOI
Jeon, In Ho; Kim, In Hyoun A note on spectral continuity. (English) Zbl 1439.47013 Korean J. Math. 23, No. 4, 601-605 (2015). MSC: 47A66 47A10 47A53 47B02 PDFBibTeX XMLCite \textit{I. H. Jeon} and \textit{I. H. Kim}, Korean J. Math. 23, No. 4, 601--605 (2015; Zbl 1439.47013) Full Text: DOI
Lee, Jae Won; Jeon, In Ho On the spectral continuity. (English) Zbl 1439.47018 Korean J. Math. 23, No. 1, 65-72 (2015). MSC: 47B20 47A10 47A53 47A66 PDFBibTeX XMLCite \textit{J. W. Lee} and \textit{I. H. Jeon}, Korean J. Math. 23, No. 1, 65--72 (2015; Zbl 1439.47018) Full Text: DOI
Jeon, In Ho; Kim, In Hyoun On \(k\)-quasi-class \(A\) contractions. (English) Zbl 1467.47009 Korean J. Math. 22, No. 1, 85-89 (2014). MSC: 47B20 47A10 47A15 PDFBibTeX XMLCite \textit{I. H. Jeon} and \textit{I. H. Kim}, Korean J. Math. 22, No. 1, 85--89 (2014; Zbl 1467.47009) Full Text: DOI
Jeon, In Ho; Kim, In Hyoun Continuity of the spectrum on a class \(A(k)\). (English) Zbl 07443886 Korean J. Math. 21, No. 1, 75-80 (2013). MSC: 47A10 47B02 PDFBibTeX XMLCite \textit{I. H. Jeon} and \textit{I. H. Kim}, Korean J. Math. 21, No. 1, 75--80 (2013; Zbl 07443886) Full Text: DOI
Lee, Jae Won; Jeon, In Ho Continuity of the spectrum on \((\text{class}\mathcal{A})^*\). (English) Zbl 1516.47040 Korean J. Math. 21, No. 1, 35-39 (2013). MSC: 47B20 47A10 PDFBibTeX XMLCite \textit{J. W. Lee} and \textit{I. H. Jeon}, Korean J. Math. 21, No. 1, 35--39 (2013; Zbl 1516.47040) Full Text: DOI Link
Kim, In Hyoun; Duggal, B. P.; Jeon, In Ho On quasi-class \(\mathcal{A}\) operators. (English) Zbl 1516.47039 Korean J. Math. 19, No. 2, 205-209 (2011). MSC: 47B20 PDFBibTeX XMLCite \textit{I. H. Kim} et al., Korean J. Math. 19, No. 2, 205--209 (2011; Zbl 1516.47039) Full Text: DOI
Lee, Jae Won; Jeon, In Ho A study on operators satisfying \(|T^2| \geq |T^\ast|^2\). (English) Zbl 1516.47041 Korean J. Math. 19, No. 1, 61-64 (2011). MSC: 47B20 47A15 PDFBibTeX XMLCite \textit{J. W. Lee} and \textit{I. H. Jeon}, Korean J. Math. 19, No. 1, 61--64 (2011; Zbl 1516.47041) Full Text: DOI