theorem instCoeEconomicAgentMaterialEntity._proof_1
theorem instCoeEconomicAgentMaterialEntity._proof_1: ∀ (v : ffjw87je.EconomicAgent), ta3nj1a4.MaterialEntity.Is (Subtype.val v)
theorem instCoeEconomicAgentMaterialEntity._proof_1
theorem instCoeEconomicAgentMaterialEntity._proof_1: ∀ (v : ffjw87je.EconomicAgent), ta3nj1a4.MaterialEntity.Is (Subtype.val v)