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Theorem char-in-one

⊦ char ∈ char0 ' ↔ char = char0

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

View the proof

Infos about the proof

Proved?: Yes
Interactions: 1
Proof steps: 1
Used lemmas: in-def,
Used spec theorems:
- Used simplifier rules:
  - string2list/s2l-one
  - list/charlist/in-17