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Theorem del-addeq-03

⊦ a ∈ s ∧ a ≠ a0 → (s -- a0) ++ a = s -- a0

Type: A user defined theorem
Validity: The proof is valid.
Features: s, ls, localcut,
Comment:
Used by:
Used by units in proved state: oset,
Proof exists?: Yes

View the proof

Infos about the proof

Proved?: Yes
Interactions: 0
Proof steps: 2
Used lemmas: Delete,
Used spec theorems:
- Used simplifier rules:
  - set-basic/eq-03