Core-like groups resulting in invalidation of k-shell decomposition analysis

Ying Liu,1, 2 Ming Tang,1, ∗ Tao Zhou,1, 3 and Younghae Do4 Web Sciences Center, University of Electronic Science and Technology of China, Chengdu 610054, China Department of Computer Science and Technology, Southwest Petroleum University, Chengdu 610500, China Big Data Research Center, University of Electronic Science and Technology of China, Chengdu 610054, China Department of Mathematics, Kyungpook National University, Daegu 702-701, South Korea (Dated: September 19, 2014)