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Theorem diff-add-notin

⊦ ¬ a ∈ st → st \ (s ++ a) = st \ s

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: Diff-ext, Diff-rec,
Used spec theorems:
- store/notin-del-notin
Used simplifier rules: