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Theorem abs-nlinks-h

∀ ino. ¬ ino ∈ files ∨ ¬ ino ∈ dirs, ∀ ino. ⌜ino⌝ ∈ tree.fids → ino ∈ files, abs(tree, ino0)(dirs), ino1 ∈ files, ino0 ∈ dirs ⊦ ⌜ino1⌝ ∈ tree.fids ↔ links(ino1, dirs) ≠ ∅

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