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Theorem equal-or-one-diff
⊦ n ~ m ↔ n = m ∨ n = m + 1 ∨ m = n + 1
Type: An axiom
Validity: The proof is valid.
Features: ls, ws,
Comment:
Used by:
tree-toList-size-equal-less-2
,
Used by units in proved state:
Proof exists?: No