theorem instCoeDepTypeFiatSurfaceOfIs._proof_1
theorem instCoeDepTypeFiatSurfaceOfIs._proof_1: ∀ (x : Type) [qszr71sj.FiatSurface.Is x], qszr71sj.FiatSurface.Is x
theorem instCoeDepTypeFiatSurfaceOfIs._proof_1
theorem instCoeDepTypeFiatSurfaceOfIs._proof_1: ∀ (x : Type) [qszr71sj.FiatSurface.Is x], qszr71sj.FiatSurface.Is x