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Theorem diff-union-03

⊦ (s ∪ s0) \ s1 = (s \ s1) ∪ (s0 \ s1)

Type: A user defined theorem
Validity: The proof is valid.
Features:
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: Difference, unc, una, unrax, ext,
Used spec theorems:
- Used simplifier rules:
  - infset-basic/ne-01
  - infset-basic/In-empty