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Theorem Del-rec-same

⊦ sdt[str, tree] -- str = sdt -- str

Type: A proof obligation
Validity: The proof is valid.
Features:
Comment: |- st[a, d] -- a = st -- a
Used by:
Used by units in proved state:
Proof exists?: Yes

View the proof

Infos about the proof

Proved?: Yes
Interactions: 4
Proof steps: 8
Used lemmas: read-notin,
Used spec theorems:
- directory-tree-base/Extension
- directory-tree-base/Del-at
Used simplifier rules: