12 lines
431 B
Text
12 lines
431 B
Text
487.hlean:18:56: error: 1 unsolved subgoal
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A : Type,
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B : Type,
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f : A → B,
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g : B → A,
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ε : Π (b : B), f (g b) = b,
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b b' : B
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⊢ (ε b)⁻¹ ⬝ ε b = refl b
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487.hlean:19:0: error: failed to add declaration 'foo' to environment, value has metavariables
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remark: set 'formatter.hide_full_terms' to false to see the complete term
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λ (A : Type) (B : Type) (f : …) (g : …) (ε : …) (b b' : B),
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is_retraction.mk … ?M_1
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