6 lines
245 B
Text
6 lines
245 B
Text
theorem ex1 (x y : Nat) (h : x + 2 = y + 2) : x = y := by
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injection h with h
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traceState -- without smart unfolding the state would be a mess
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injection h with h
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traceState -- without smart unfolding the state would be a mess
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assumption
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