Kinyanjui, J. N.Okelo, N. B.Ongati, O.Musundi, S. W.2020-10-012020-10-012018-03-20International Journal of Mathematical Analysis Vol. 12, 2018, no. 3, 137 - 144https://doi.org/10.12988/ijma.2018.8211http://repository.chuka.ac.ke/handle/chuka/898In this paper we estimates the norms of norm-attainable elementary operators: inner derivations, generalized derivation, basic elementary operator and Jordan elementary operator.enNormnorm-attainabilitynonseparable Hilbert spacesArticle