, 2020. Comparative Analysis of Spectral Theory of Second Order Difference and Differential Operators with Unbounded Odd Coefficient. Kyungpook Mathematical Journal, 60, p.297–305.
Publications
, 2019. Deficiency indices and symmetry of the composite of non-commutative higher order differential operators, London: King's College, UK.
, 2019. A Measure for evaluating the degree of slope rotatability in three level second order slope rotatable designs. Journal of Advances in Mathematics and Computer Science, p.1–12.
, 2017. Essential and continuous spectrum of symmetric difference equations. Mathematische Nachrichten, 290, p.2977–2991.
, 2015. Absolutely continuous spectrum of fourth order difference equations. Mathematische Nachrichten, 288, p.1009–1027.
, 2014. On the norm of elementary operator.
, 2014. On the Norm of Elementary Operator. Advances in Pure Mathematics, 4, p.309–316.
, 2013. Deficiency indices and spectrum of fourth order difference equations with unbounded coefficients. Mathematische Nachrichten, 286, p.323–339.
, 2013. Spectral theory of higher order difference operators. Journal of Difference Equations and Applications, 19, p.1983–2028.
, 2012. Spectral analysis of higher order differential operators with unbounded coefficients. Mathematische Nachrichten, 285, p.56–73.
, 2012. Spectral analysis of higher order differential operators with unbounded coefficients II. Mathematische Nachrichten, 285, p.181–201.
, 2010. Spectral Analysis of Four Term Differential Operator. Kyungpook Mathematical Journal, 50, p.15–35.
, 2009. Two projections and one idempotent. International Journal of Pure and Applied Mathematics, 52, p.501–510.