theorem instCoeDepTypeOccurrentOfIs._proof_1
theorem instCoeDepTypeOccurrentOfIs._proof_1: ∀ (x : Type) [ta3nj1a4.Occurrent.Is x], ta3nj1a4.Occurrent.Is x
theorem instCoeDepTypeOccurrentOfIs._proof_1
theorem instCoeDepTypeOccurrentOfIs._proof_1: ∀ (x : Type) [ta3nj1a4.Occurrent.Is x], ta3nj1a4.Occurrent.Is x