10 lines
164 B
Text
10 lines
164 B
Text
exit
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open nat
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example (a b c : nat) : a = 0 → b = 1 + a → a = b → false :=
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begin
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intro a0 b1 ab,
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rewrite a0 at *,
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rewrite b1 at *,
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contradiction
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end
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