13 lines
161 B
Text
13 lines
161 B
Text
A ↣ B : f
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g a : B
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sec2.lean:13:6: error: type mismatch at application
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g a
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term
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a
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has type
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A
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but is expected to have type
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B
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A ↣ B : f
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g a : B
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g a : B
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