Explicit Equilibrium Solutions For the Aggregation Equation with   Power-Law Potentials
  Despite their wide presence in various models in the study of collective behaviors, explicit swarming patterns are difficult to obtain. In this paper, special stationary solutions of the aggregation equation with power-law kernels are constructed by inverting Fredholm integral operators or by employing certain integral identities. These solutions are expected to be the global energy stable equilibria and to characterize the generic behaviors of stationary solutions for more general interactions. 
Jos\'e A. Carrillo and Yanghong Huang
math.AP