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Theorem isobj-del-03

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

Type: A user defined theorem
Validity: The proof is valid.
Features: simp, localsimp,
Comment:
Used by: is_obj-del, is_valid_ref-del-01, reffield-del, validref-del-01,
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-classtype, isobj-type-06, isobj-type-05, isobj-null-02, isobj-isobj, isobj-del-01, is-any-object,
Used spec theorems:
- Used simplifier rules: