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Theorem Data-in-other

⊦ ¬ a ∈ st → (d0 ∈ st[a, d1] ↔ d0 ∈ st ∨ d0 = d1)

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

View the proof

Infos about the proof

Proved?: Yes
Interactions: 2
Proof steps: 4
Used lemmas: Data-in, Data-notin-other,
Used spec theorems:
- Used simplifier rules: