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Theorem last-in
⊦ str ≠ "" → str.last ∈ str
Type: A user defined theorem
Validity: The proof is valid.
Features: simp, localsimp,
Comment:
Used by:
right-trim-app
,
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-in-rec
,
last-def
,
Used spec theorems:
list-last
/charlist/
l-02
Used simplifier rules:
string2list
/
s2l-empty-01
list-last
/charlist/
l
list
/charlist/
a
list
/charlist/
app
string2list
/
s2l-empty
string-append
/
assoc
string2list
/
s2l-rec
string-append
/
chartostring-01