theorem instCoeDepTypeFiatSurfaceOfIs._proof_1
theorem instCoeDepTypeFiatSurfaceOfIs._proof_1: ∀ (x : Type) [ta3nj1a4.FiatSurface.Is x], ta3nj1a4.FiatSurface.Is x
theorem instCoeDepTypeFiatSurfaceOfIs._proof_1
theorem instCoeDepTypeFiatSurfaceOfIs._proof_1: ∀ (x : Type) [ta3nj1a4.FiatSurface.Is x], ta3nj1a4.FiatSurface.Is x