Study of non-normal operators in a complex Hilbert space. Submitted by drupal_dev on Sun, 03/14/2021 - 20:05 Publication Year 2008 Mile, J,K.; Rao, G.K.R.; Ogonji, J.A. Simiyu, A.N. Journal of Mathematical Sciences, 19(2), 153-161. (International Centre for Advanced Studies, India)