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Theorem append-fininf

⊦ ⌜x⌝ + ⌜nf⌝ = ⌜λ n. (n < # x ⊃ x[n];nf(n - # x))⌝

Type: An axiom
Validity: The proof is valid.
Features:
Comment:
Used by: append-assoc, append-cancel-l, append-empty-01, cons-append, cons-eq, cons-eq-inf, elim-fromto, elim-fromto-inf, empty-append, get-append-ls, get-append-notls, hd-lem, neq-fin-inf-01, neq-fin-inf-02, size-append, tl-lem, to-plus-from-inf-simp,
Used by units in proved state:
Proof exists?: No