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Signature symbols in this unit

Symbol	Specification	Kind	Type
# .	string	f	String → Nat
. '	string	f	Char → String
. + .	nat-basic	f	Nat × Nat → Nat
. + .	string	f	Char × String → String
. + .	string	f	String × String → String
. + .	string	f	String × Char → String
. ++ .	string	f	String × Char → String
. +1	nat-basic	f	Nat → Nat
. +2 .	string	f	Char × Char → String
. - .	nat	pf	Nat × Nat → Nat with λ n, m. n ≥ m
. -1	nat-basic	pf	Nat → Nat with λ n. n ≠ 0
. -1l .	string	f	String × Char → String
. -l .	string	f	String × Char → String
. -p .	string	f	String × Nat → String
. .butlast	string	pf	String → String with λ x. x ≠ ""
. .char1	string	pf	String → Char with λ x. x ≠ ""
. .last	string	pf	String → Char with λ x. x ≠ ""
. .rstring	string	pf	String → String with λ x. x ≠ ""
. < .	nat-basic	p	Nat × Nat
. > .	nat	p	Nat × Nat
. [ . ]	string	pf	String × Nat → Char with λ x, n. n < # x
. [ . ]	string	pf	String × Nat × Char → String with λ x, n, a. n < # x
. ∈ .	string	p	Char × String
. ≤ .	nat	p	Nat × Nat
. ≥ .	nat	p	Nat × Nat
. ⊑ .	string	p	String × String
. ⊒ .	string	p	String × String
⊏	string	p	String × String
Char	char	s
Nat	nat-basic	s
String	string	s
butlastn	string	pf	Nat × String → String with λ n, x. n ≤ # x
char	string	v	Char
disj	string	p	String × String
dups	string	p	String
fillfirst	string	f	Nat × Char × String → String
firstn	string	pf	Nat × String → String with λ n, x. n ≤ # x
frome	string	f	String × Char → String
lastn	string	pf	Nat × String → String with λ n, x. n ≤ # x
mklist	string	f	Char × Nat → String
pos	string	f	Char × String → Nat
restn	string	pf	Nat × String → String with λ n, x. n ≤ # x
rev	string	f	String → String
rmdup	string	f	String → String
sublist	string	pf	Nat × Nat × String → String with λ n, m, x. n + m ≤ # x