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Theorem lastn-restn-01

n ≤ # x ⊦ lastn(n, x) = restn(# x - n, x)

Type: A user defined theorem
Validity: The proof is valid.
Features:
Comment:
Used by: elim-lastn-butlastn, firstN-lastN, firstn-last-eq, lastN-all, lastN-append, lastN-ex, lastN-rest, lastn-mklist-01,
Used by units in proved state:
Proof exists?: Yes

View the proof

Infos about the proof

Proved?: Yes
Interactions: 4
Proof steps: 11
Used lemmas: restN-append, lastN-rec, rest-empty, lastN-zero,
Used spec theorems:
- Used simplifier rules: