13 lines
235 B
Text
13 lines
235 B
Text
def foo (n : Nat) : Nat :=
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if n = 0 then 0 else
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let x := n - 1
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have := match () with | _ => trivial
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foo x
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termination_by _ n => n
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decreasing_by sorry
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theorem ex : foo 0 = 0 := by
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unfold foo
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sorry
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#check foo._unfold
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