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Theorem lslen-fromnotempty-list

⊦ n < # x → (x from n = [] ↔ false)

Type: A user defined theorem
Validity: The proof is valid.
Features: simp, localsimp,
Comment:
Used by: lslen-fromnotempty,
Used by units in proved state:
Proof exists?: Yes

View the proof

Infos about the proof

Proved?: Yes
Interactions: 1
Proof steps: 2
Used lemmas: length-from,
Used spec theorems:
- list-del/extension
Used simplifier rules: