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Theorem oc-filt-01

⊦ ¬ a ∈ y → #oc(a, filter(x, y)) = 0

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

View the proof

Infos about the proof

Proved?: Yes
Interactions: 0
Proof steps: 1
Used lemmas: oc-zero,
Used spec theorems:
- Used simplifier rules:
  - list-set/notin-02