Community Search over Big Graphs: Models, algorithms, and Opportunities Xin Huang*, Laks V.S. Lakshmanan, Jianliang Xu UNiversity of british Columbia, Vancouver, canada Hong Kong Baptist University, Hong Kong, China xinhuang@comp. hkbu. edu. hk, laks@ubc. cS. ca, xul@comp. hkbu. edu. hk UBC 浸會 历 1956 BAPTISCommunity Search over Big Graphs: Models, Algorithms, and Opportunities Xin Huang∗† , Laks V.S. Lakshmanan∗ , Jianliang Xu† ∗University of British Columbia, Vancouver, Canada †Hong Kong Baptist University, Hong Kong, China xinhuang@comp.hkbu.edu.hk, laks@ubc.cs.ca, xujl@comp.hkbu.edu.hk