Fast Methods for Finding Multiple Effective Influencers in Real Networks.

We present scalable first hitting time methods for finding a collection of nodes that enables the fastest time for the spread of consensus in a network. That is, given a graph = () and a natural number , these methods find vertices in that minimize the sum of hitting times (expected number of steps of random walks) from all remaining vertices. Although computationally challenging for general graphs, we exploited the characteristics of real networks and utilized Monte Carlo methods to construct fast approximation algorithms that yield near-optimal solutions.

Q-matrix: An Algebraic Formulation for the Analysis and Visual Characterization of Network Graphs.

Given an undirected network, we describe a two-dimensional graphical measure based on the connected component distribution of its degree-limited subgraphs. This process yields an unambiguous visual , which reveals important network properties. It can be used as a classification tool, as graphs from related application areas have striking similarities.