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Theorem less-append

⊦ str < str + str0 ↔ str0 ≠ ""

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

View the proof

Infos about the proof

Proved?: Yes
Interactions: 3
Proof steps: 7
Used lemmas: Char-irref, Less-rec, less-empty, Irreflexivity,
Used spec theorems:
- Used simplifier rules: