theorem instCoeDepTypeOccurrentOfIs._proof_1
theorem instCoeDepTypeOccurrentOfIs._proof_1: ∀ (x : Type) [qszr71sj.Occurrent.Is x], qszr71sj.Occurrent.Is x
theorem instCoeDepTypeOccurrentOfIs._proof_1
theorem instCoeDepTypeOccurrentOfIs._proof_1: ∀ (x : Type) [qszr71sj.Occurrent.Is x], qszr71sj.Occurrent.Is x