6 lines
310 B
Text
6 lines
310 B
Text
wf2.lean:3:8-3:17: error: failed to prove termination, possible solutions:
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- Use `have`-expressions to prove the remaining goals
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- Use `termination_by` to specify a different well-founded relation
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- Use `decreasing_by` to specify your own tactic for discharging this kind of goal
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x y : Nat
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⊢ x - 1 < x
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