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Theorem isobj-put-samefield-03

⊦ is_obj(r, st) ∧ oktype(val, fs .type, st) ∧ fs ' ≠ _type → is_obj(r, st[r -- fs ', val])

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

View the proof

Infos about the proof

Proved?: Yes
Interactions: 3
Proof steps: 12
Used lemmas: isobj-put-samefield-02, isobj-classtype, isobj-type-06, isobj-type-05, isobj-null-02, is-any-object,
Used spec theorems:
- Used simplifier rules: