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Theorem undel-02

⊦ (s ∪ s0) -- a = (s -- a) ∪ (s0 -- a)

Type: A user defined theorem
Validity: The proof is valid.
Features: simp,
Comment:
Used by:
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: unc, una, undel-04,
Used spec theorems:
- Used simplifier rules: