14 lines
219 B
Text
14 lines
219 B
Text
import data.nat
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open algebra nat
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section
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open nat
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set_option blast.strategy "ematch"
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attribute add.comm [forward]
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attribute add.assoc [forward]
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example (a b c : nat) : a + b + b + c = c + b + a + b :=
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by blast
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end
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