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Theorem ccd-no-write-down

⊦ alter(domvar, CreditCardCenter-ccd, mkCreditCardCenter(n)) → domvar ⇒ dom(CreditCardCenter-ccd, mkCreditCardCenter(n))

Type: A proof obligation
Validity: The proof is valid.
Features: theorem,
Comment: attribute ccd in class CreditCardCenter has explicit domain User.
Used by:
Used by units in proved state:
Proof exists?: Yes

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Infos about the proof

Proved?: Yes
Interactions: 1
Proof steps: 2
Used lemmas:
Used spec theorems:
- Used simplifier rules: