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Theorem validref-del-01

⊦ r ≠ r0 → (is_valid_ref(r, st -- r0) ↔ is_valid_ref(r, st))

Type: A user defined theorem
Validity: The proof is valid.
Features: simp, localsimp,
Comment:
Used by: is_valid_ref-del-01, reffield-del,
Used by units in proved state:
Proof exists?: Yes

View the proof

Infos about the proof

Proved?: Yes
Interactions: 2
Proof steps: 4
Used lemmas: isobj-del-03, is-valid-ref,
Used spec theorems:
- Used simplifier rules:
  - okfuns/isarray-del