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Theorem to-attach

⊦ ⌜x + a '⌝ .take(# x) = x

Type: A user defined theorem
Validity: The proof is valid.
Features: s, ls,
Comment:
Used by:
Used by units in proved state:
Proof exists?: Yes

View the proof

Infos about the proof

Proved?: Yes
Interactions: 0
Proof steps: 2
Used lemmas: append-assoc, append-to-size-01, cons-to-addnum, append-finfin, to-fin,
Used spec theorems:
- Used simplifier rules: