We study distributional solutions to the radially symmetric aggregation equation for power-law potentials. We show that distributions containing spherical shells form part of a basin of attraction in the space of solutions in the sense of “shifting stability." For spherical shell initial data, we prove the exponential convergence of solutions to equilibrium and construct some explicit solutions for specific ranges of attractive power. We further explore results concerning the evolution and equilibria for initial data formed from convex combinations of spherical shells.@en

In this work we consider local minimizers (in the topology of transport distances) of the interaction energy associated with a repulsive–attractive potential. We show how the dimensionality of the support of local minimizers is related to the repulsive strength of the potential at the origin.@en

In this paper, we consider the aggregation equation and global in time solutions for this equation when the potential is radially symmetric, attractive-repulsive with possible polynomial growth at infinity and the initial data is compactly supported. We will discuss certain aspects of the existence of nonsingular steady states of the equation for these type of potentials based on numerical results in the radially symmetric case.@en