%0 Journal Article %T Spectrum of the Direct Sum of Operators %A E. Otkun Cevik %A Z. I. Ismailov %J Mathematics %D 2011 %I arXiv %X In this work, a connection between some spectral properties of direct sum of operators in the direct sum of Hilbert spaces and its coordinate operators has been investigated. %U http://arxiv.org/abs/1105.4223v1