20 lines
467 B
Text
20 lines
467 B
Text
example (x y z x' y' z': ℕ) (h : (x, y, z) = (x', y', z')) : false :=
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begin
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injection h,
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guard_hyp h_1 := x = x',
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guard_hyp h_2 := (y, z) = (y', z'),
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injection h_2,
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guard_hyp h_3 := y = y',
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guard_hyp h_4 := z = z',
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admit
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end
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example (x y z x' y' z': ℕ) (h : (x, y, z) = (x', y', z')) : false :=
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begin
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injections,
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guard_hyp h_1 := x = x',
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guard_hyp h_2 := (y, z) = (y', z'),
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guard_hyp h_3 := y = y',
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guard_hyp h_4 := z = z',
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admit
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end
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