20 lines
465 B
Text
20 lines
465 B
Text
namespace ex
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set_option blast.strategy "backward"
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constant typ : Type₁
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constant subtype : typ → typ → Prop
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constant subtype_refl : ∀ T, subtype T T
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constant subtype_trans : ∀ S T U, subtype S T → subtype T U → subtype S U
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attribute subtype_refl subtype_trans [intro]
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lemma L1 : ∀ T1 T2 T3 T4 T5 T6, subtype T1 T2 → subtype T2 T3 → subtype T3 T4 → subtype T4 T5 → subtype T5 T6 → subtype T1 T6 :=
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by blast
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reveal L1
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print L1
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end ex
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