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Theorem restn-apprec

⊦ x.drop(n).drop(m) = x.drop(m + n)

Type: A user defined theorem
Validity: The proof is valid.
Features: s, ls,
Comment:
Used by: restn-restn, sublist-last, sublist-prefix, sublist-restn, sublist-restn-01,
Used by units in proved state: stream, stream-old,
Proof exists?: Yes

View the proof

Infos about the proof

Proved?: Yes
Interactions: 0
Proof steps: 4
Used lemmas: restN-rec, restN-zero,
Used spec theorems:
- Used simplifier rules: