def equilibriumShare (a cost : Fin J → ℝ) (ρ : ℝ) (j : Fin J) : ℝ := agentFitness a cost ρ j / ∑ k : Fin J, agentFitness a cost ρ k
thesis/CESProofs/CurvatureRoles/GameTheory.lean:125
Multi-Agent CES Game Theory (Gap #14)