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Theorem in-dom-eq

⊦ dom st0 = dom st1 ∧ a ∈ st0 → a ∈ st1

Type: A user defined theorem
Validity: The proof is valid.
Features: ss, lss,
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: 4
Used lemmas: Dom,
Used spec theorems:
- set-basic/Extension
Used simplifier rules: