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Theorem eqpos
⊦ pos(char1, str) < # str → (pos(char1, str) = pos(char2, str) ↔ char1 = char2)
Type: A user defined theorem
Validity: The proof is valid.
Features: s, ls,
Comment:
Used by:
val-total-01
,
Used by units in proved state:
Proof exists?: Yes
View
the proof
Infos about the proof
Proved?: Yes
Interactions: 3
Proof steps: 9
Used lemmas:
length-one
,
len-app
,
Used spec theorems:
list-del
/string/
pos-n
Used simplifier rules:
list-data
/string/
l
nat-basic
/
f
nat
/
lels
nat-basic
/
c
nat-basic
/
a
nat-basic
/
s-04
list
/string/
a
list
/string/
c
list
/string/
e-01
list-del
/string/
pos-y
list-del
/string/
pos-n
nat-basic
/
oz
nat
/
succ-01
nat
/
eqle-one
nat-basic
/
eq-01