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Theorem intersect-one

⊦ a ' intersect y = [] ↔ ¬ a ∈ y

Type: A user defined theorem
Validity: The proof is valid.
Features: s, ls,
Comment:
Used by: intersect-empty-cons-01, intersect-notempty, intersect-rest,
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: intersect-one-02, intersect-one-01,
Used spec theorems:
- Used simplifier rules:
  - list/e