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Theorem dom-union-l

⊦ dom(st0 ⊕ st1) = dom st0 ∪ dom st1

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: 2
Proof steps: 3
Used lemmas: oplus-l-in, Dom,
Used spec theorems:
- set-basic/Extension
- set-union/Union
Used simplifier rules: