RT - Journal Article T1 - Spectra of Some New Graph Operations and Some New Class of Integral Graphs JF - IJMSI YR - 2018 JO - IJMSI VO - 13 IS - 1 UR - http://ijmsi.ir/article-1-755-en.html SP - 51 EP - 65 K1 - Duplication corona K1 - Duplication edge corona K1 - Duplication neighborhood corona K1 - Cospectral graphs K1 - Integral graphs. AB - In this paper, we define duplication corona, duplication neighborhood corona and duplication edge corona of two graphs. We compute their adjacency spectrum, Laplacian spectrum and signless Laplacian. As an application, our results enable us to construct infinitely many pairs of cospectral graphs and also integral graphs. LA eng UL http://ijmsi.ir/article-1-755-en.html M3 ER -