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Theorem union-difference

⊦ s ⊆ s0 → s ∪ (s0 \ s) = s0

Type: A user defined theorem
Validity: The proof is valid.
Features: simp, localsimp,
Comment:
Used by:
Used by units in proved state:
Proof exists?: Yes

View the proof

Infos about the proof

Proved?: Yes
Interactions: 1
Proof steps: 2
Used lemmas: Difference, unc, una, unrax,
Used spec theorems:
- Used simplifier rules:
  - set-union/subdef
  - set-basic/Extension