(sorted-set & keys)
Returns a new sorted set with supplied keys. Any equal keys are handled as if by repeated uses of conj.
user=> (sorted-set 3 2 1)
#{1 2 3}
user=> (sorted-set 3 2 1 1)
#{1 2 3}
user=> #{2 1 3}
#{1 3 2}
user=> (apply sorted-set #{2 1 3})
#{1 2 3}