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Theorem int-inse

⊦ s ∩ (s0 ++ a) = ∅ → s ∩ s0 = ∅ ∧ ¬ a ∈ s

Type: A user defined theorem
Validity: The proof is valid.
Features: forward, localforward,
Comment:
Used by: int-ins,
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: intersection-insert, int-c, int-a, int-inserte,
Used spec theorems:
- Used simplifier rules: