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Theorem subset-union31
h1 ⊥ h2, h2 ⊥ h3, h1 ⊥ h3 ⊦ h1 ⊆ h1 ∪ h2 ∪ h3
Type: A user defined theorem
Validity: The proof is valid.
Features: ss, lss,
Comment:
Used by:
subset-union32
,
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:
subset-union
,
disj-distr-uni
,
Used spec theorems:
Used simplifier rules: