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Theorem fin-size-from

⊦ ⌜n⌝ < # σ ∧ finp(σ) → #(σ from n) = ⌜(# σ).n - n⌝

Type: A user defined theorem
Validity: The proof is valid.
Features: simp,
Comment:
Used by: from-append-add, from-append-tofrom, swap-from-to, swap-to-from-app,
Used by units in proved state: inf-app-list, infinite-append,
Proof exists?: Yes

View the proof

Infos about the proof

Proved?: Yes
Interactions: 0
Proof steps: 1
Used lemmas: length-from, size-fin, from-fin,
Used spec theorems:
- Used simplifier rules: