theorem instCoeMammalObject._proof_1
theorem instCoeMammalObject._proof_1: ∀ (v : nnzmbnte.Mammal), ta3nj1a4.Object.Is (Subtype.val v)
theorem instCoeMammalObject._proof_1
theorem instCoeMammalObject._proof_1: ∀ (v : nnzmbnte.Mammal), ta3nj1a4.Object.Is (Subtype.val v)