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Theorem diff-union

⊦ st \ (s1 ∪ s2) = (st \ s1) \ s2

Type: A user defined theorem
Validity: The proof is valid.
Features: s, ls,
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: Diff-del-rw, Diff-rec, Diff-base,
Used spec theorems:
- Used simplifier rules: