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Theorem Del-at

⊦ a ≠ b → lookup(a, st -- b) = lookup(a, st)

Type: A proof obligation
Validity: The proof is valid.
Features:
Comment: |- not a = b -> (st -- b)[a] = st[a]
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:
Used spec theorems:
- lookup/lookup-def
Used simplifier rules:
- store/Del-at
- lookup/lookup-def