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Theorem s2n-char-01

# str = 1 ⊦ s→n(str) = pos(str.char1, '0' + '1' + '2' + '3' + '4' + '5' + '6' + '7' + ('8' + '9'))

Type: A user defined theorem
Validity: The proof is valid.
Features:
Comment:
Used by: charn0, charn1, charn2, charn3, charn4, charn5, charn6, charn7, charn8, charn9,
Used by units in proved state:
Proof exists?: Yes

View the proof

Infos about the proof

Proved?: Yes
Interactions: 2
Proof steps: 4
Used lemmas: s2n-char,
Used spec theorems:
- Used simplifier rules:
  - list/charlist/a
  - string-append/first-one
  - string-append/empty-01
  - nat-basic2/c
  - nat-basic2/a
  - string-less/len-zero
  - nat-basic2/one-03
  - string-append/assoc
  - string-less/Length-rec
  - string-append/chartostring-01
  - string-less/Length-empty
  - list/charlist/c
  - list/charlist/Two