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Theorem assoc

⊦ (str1 + str2) + str3 = str1 + str2 + str3

Type: A user defined theorem
Validity: The proof is valid.
Features: simp,
Comment:
Used by:
Used by units in proved state: string-less,
Proof exists?: Yes

View the proof

Infos about the proof

Proved?: Yes
Interactions: 0
Proof steps: 3
Used lemmas: append-rec, app, append-base,
Used spec theorems:
- Used simplifier rules:
  - string-data/inj-01