56733b953e
this PR aligns the terminology of the code with the one use in the reference manual, as developed with and refined by @david-christiansen.
18 lines
568 B
Text
18 lines
568 B
Text
wf1.lean:1:4-1:5: error: fail to show termination for
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g
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with errors
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failed to infer structural recursion:
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Cannot use parameter x:
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failed to eliminate recursive application
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g (x - 1)
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Cannot use parameter y:
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insufficient number of parameters at recursive application
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g (x - 1)
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Could not find a decreasing measure.
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The basic measures relate at each recursive call as follows:
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(<, ≤, =: relation proved, ? all proofs failed, _: no proof attempted)
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x y y - x
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1) 3:12-19 ≤ ? ?
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Please use `termination_by` to specify a decreasing measure.
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