Ing. Tomáš Votroubek

A separable network game is a multiplayer finite strategic game in which each player interacts only with adjacent players in a simple undirected graph. The utility of each player results from the aggregation of utilities in the corresponding two-player games. In our contribution, we extend this model to infinite games whose strategy sets are compact subsets of the Euclidean space. We show that Nash equilibria of a zero-sum continuous network game can be characterized as optimal solutions to a specific infinite-dimensional linear optimization problem. In particular, when the utility functions are multivariate polynomials, this optimization formulation enables us to approximate the equilibria using a hierarchy of semidefinite relaxations. We present a security game over a complete bipartite graph in which the nodes are attackers and defenders, who compete for control over given targets.